When you spoke about light pollution I remembered when I heard about when there was a blackout in a big city and all the lights went out, the police station kept getting calls from people freaking out about the "big colorful streak in the sky". It was the milky way.
I'm not surprised. By now at least 95% of humans not only keep their heads down to the ground but burying their faces in their electronic toys. That's probably they're afraid to look up. The sense of wonder is fading away for some.
two weeks agot we had a nation wide blackout in my country that lasted for 12 ours... I rushed outside to finally see the sky as it should look... it was completely covered by clouds!!!!
We should have a national holiday where, for one night, cities turn off most of their lights, enough to ward off the light pollution, but still keep things operational.
I actually heard that a blackout in Los Angeles caused panic when people saw the Milky Way for the first time Aww shit, I just realized that during the blackout after Hurricane Sandy, I could've done some skywatching, but instead I went inside cuz bugs
Joseph Schmitz yeah, there were also a few blackouts in New York, most recent 2003, one of these day's I'm going to go out to some rural place and have a look at the milky way.
I went to Death Valley, CA this week, which is known for the best place to see the Milky Way here in southern California...I screwed myself over by not checking the Moon Phase and it turned out it was a full moon on the night I was there. The moon was SO bright we couldn't see the Milky Way as bright as we'd hoped. Anyone thinking of star gazing, check your moon!
When I grow up (I'm 14 now) I want to be an Astronomer, my friends laugh at me and say that it's not a real job, and that I will not amount to anything if I try to follow this dream, idk why I'm posting this but if you also have this dream don't give it up because your so called friends say it's stupid, Astronomers play an important role in today's society, so get out there and achieve your dreams, as I want to achieve mine!
I completely agree, I'm currently 13 and my dream is to become one too. I feel like the future of humanity depends on it. Astronomy is so unique and different from most fields because you study something that is unknown. I really hope that I get my dream job, it's not even about the money or whatnot, for me it's the passion and just knowing something that is truly beautiful and amazing.
+Alecx Gwynn All my life, I've wanted to be a doctor. Last month, I was watching an Astronomy video about the Solar System. My dad noticed how intrigued I was by the video. I was literally putting my face in the screen. It took me 13 and a half years to finally figure out what I really wanted to do. I wanted to become an Astronomer. True Life Story
I want to learn so much about the space. It gives me chills when I learn something new in this topic. This subject is so vast yet interesting. I could work for NASA as a scientist if given an opportunity for free.
Kevin Stitely I kinda had the opposite reaction, this guy talks a bit too slowly for my taste. Fortunately I can just speed him up to 1.25x normal speed, I do love that UA-cam feature.
Greg Miller See the settings gear, just to the left of the button that lets you change the size of the UA-cam screen? Speed is a setting you can change there, from 0.25x to 2.0x regular speed.
Look for mountains in arid regions. Drier, thinner air helps, and nobody wants to live on a mountain in the desert. That why so many observatories are in Chile; the Atacama desert has high mountains and is the driest place on Earth.
This was so interesting! Light pollution really does suck - I grew up in NYC, so I basically never saw a single star. In my late teens I'm living in NJ and on a good night I see only a couple of stars (like maybe 5). It fascinates me that people live in places where they can look up and see that many stars every (clear) night. Hopefully one day I'll experience that in person :)
That was crazy to me too. I knew that people in more rural areas saw more stars in the sky but I always thought it was to do with how much light at that time and not a long term thing or even the extent it was hindering our view of the sky. Being from Vegas where Paradise has what are probably thousands of lights going up into the sky, the difference is huge.
Will Black yeah it's just something I can't wrap my head around - being able to step outside every night and there are more stars then there is black/orangeness.
Alanna R. hahah I can't imagine living further from the city though! I love living in crowded places. Rural places kinda scare me a bit.. so does the open starry sky because it makes me realize how insignificant and small we are to the rest of the universe.
Imagine all the morons that call 911 because the whole city has a power outage, seeing strange flickering lights and multicolored clouds in the night sky with absolute clarity and not knowing what they are. (That has actually happened)
I want to be an astronaut, I'm doing well at school but I don't think that's enough, ik its difficult and unlikely but space just fascinates me so much
+katie jane you know you can choose what ever career path you want and still make space part of it ; I mean take whatever field come to your mind and search about it's relation with space you will find it related . EVERYTHING in our life is related to the space but they don't teach you that in school ; even ECONOMIC has a lot to do with space .
Katie that's not what Reema meant. Reema meant that if you're interested in space you don't necessarily have to be an astronaut to make space part of your career. You can be an engineer, a computer scientist, a biologist, a economist, a business person - anything - and still pursue a career in space; especially given how a good number of private companies have emerged in the space industry. We will need all sorts of expertise - engineers to implement technologies to get us into space, around space and build facilities in space, biologists to examine the growth of crops/animals in space, psychologists to study the effects of space on human behaviour, economists to incorporate the space economy into the traditional Earth macroeconomy, lawyers to work on the new legal challenges that space will bring... etc. You get the idea. Stay open!
Is it sad that I've learned more from crash course than I have from school? EDIT: Wow that’s a lot of likes! Four years later and here I am still looking at crash course for school help. Stay safe during the quarantine everyone ♥
It's probably because the guys who do these are far more interesting then your average teacher. I learned more from 7 episodes of the Biology playlist than I did from 2 months of biology class.
Well, one, teachers don't exactly have lots of chances when it comes to outakes. Teachers also have to keep a group of people under control. Teachers aren't exactly entertainers, for example, teachers can sound boring as they have to work almost 12 hours a day, prepping work and activities. Finally, a teacher can't really talk at you for 50 minutes, both you and the teacher will get bored.
+Nanni Narayanan :D That was good! Sure, at those times people were more creative because there weren't schools and places they could learn, they didn't know so they had free time because no technological stuff was invented and they could think more! :D
+Nanni Narayanan Well, actually I'm in Turkey, so that's some hard just... don't worry about it, change will be in time, I improve myself, I know it's hard but I'm trying to do my best :)
As a two time Alaskan fisherman I can attest there are still places you can see the sky in all its glory. 5 miles off the Aleutian islands there is no light pollution. You can't see your hand in front of your face. You can see the sky the way our ancestors saw it. The nights when the ocean was calm and reflected the sky are the nights I will never forget.
I went outside nude complete with bare feet at night once to check on the progress of a lunar eclipse. I stepped on a banana slug. After hopping back into the house on one foot and taking over a half hour to clean the slime off, the totality was over. At least wear shoes!
The funny thing is, in some circles, being naked under the sky is known as being "sky-clad". Some people think that it has mystical significance. Still cold, though.
I love ur videos, I am a 13 year old arabic boy who studied english in the best seen way(by me) and ever since I looked wt the moon, I always and still are dreaming of becoming an astronomer, u made me realize that ever since that moment, I was an astronomer, astronomy is my favorite out of all, u are helping me study it, and I thank u so much for ur job, I still want to see even beyond, maybe even study andromeda, but our generation is way behind that of a path, I never seen a clear sky with no light pollution, but I will see it very soon, thanks to ur info, im looking more into ur studies. Hoping ill become an expert...
Even in small cities you can´t really see the sky, the first time I got far from the city and saw the bright cloud of stars and the glow behind them I wasn't sure what I was seeing, I mean, I knew it was the milky way, but pictures in school books don't come close to preparing you to see it, it was f'ing epic, no wonder why ancients believed in gods and magic...
As someone who has never studied any astronomy before (or at least not since primary school), I'm loving this so far, especially this episode. Really clear and easy to follow, but I still feel like you covered a lot! ^^
The main disadvantage of living north of the Arctic circle is that I never get to see the summer constellations, but on the flip side, I do get to see the winter stars pretty much as much as I want. (Also, when I lived in a larger town for a while, I did notice that the sky appeared darker because of all the light pollution, and that I struggled to find a lot of the familiar constellations I'm used to seeing here.)
Fellas, I applaud you from the bottom of my heart for putting all these vids together. I'm slowly making my way through all of them in my spare time. Loving it!
This is why I sometimes think the, 'crash course,' approach has drawbacks. All this information about naked eye observation was correct, BUT, I have two problems. 1) The presentation failed to stress certain in order of avoid confusion. For example, he said that at the North POLE you'll never see stars in the southern hemisphere. But zero of the viewers live at the North Pole, and because it went by so fast, with no special stress, I'll bet many came away thinking he said, that in the northern Hemisphere, nobody sees stars from the southern celestial hemisphere... which is totally not true. Depending on your latitude, you DO see stars from the opposite hemisphere at different times of year. And this leads to my second problem... 2) Because this is a, 'crash course," the subject of naked eye astronomy will never be visited again. This means that the above example of north south dynamics will never be touched on again... which is a shame. Because THAT'S where all the confusion lies for people, and THAT'S the stuff teachers never explain, leading to generation after generation of people who end up not caring because it all seems too confusing. Another example: He mentioned that Polaris never appears to move all night long. We've heard that before. What he failed to mention was that Polaris never appears to move (from whatever latitude you're observing from) all YEAR long. And that would've been a great starting point to explaining why at certain times of year we see different constellations at night... because we're in different parts off our orbit, which means different parts of the sky are blotted out by the sun each day, and revealed each night... DUE TO THE FACT that Polaris can never move... because, angular momentum. That would've been educational. Instead, this was just regurgitating stuff that has been taught since forever and will never lead to anything but the same confusion among the public. # # #
To your point 1, I think there was some stress given to it, but I would have liked if Phil had said something like "and if you live somewhere in between, you see something in between." But to the second point, I think you need to give the show some benefit of the doubt here. They haven't touched on the seasons yet. The episode was mostly focusing on what you could see in the sky in one night, and it would be a little out of place to just throw the seasons in there. I think in future episodes (maybe the next?) they'll get to the seasons and the axial tilt of the earth, and that Polaris doesn't appear to move, AND the precession of the Earth, and how Polaris really does appear to move in the sky over very long periods of time.
From what I've seen of other Crash Courses on this channel, they do refer to previous material; I think John even mentioned something from CC World History in CC World History 2. It may not be the case in this series since it's a different host, but we should give them the benefit of the doubt.
killahtizoe He said over the course of a whole day, all the stars would be visible. There is a big difference between saying you can see all the stars, and the time it takes to see all of them.
I think your point 1 is kind of a stretch. You are assuming you know what others will think they hear/understand. For example, it never entered my mind to conflate the north pole with the northern hemisphere. As to point 2, you are assuming you know what the rest of this series will be about/talk about. It is true that these crash courses can't touch on everything...hence 'crash course'. Its to get you interested and maybe go and learn more.
There are a bunch of names with astronomical origins. Draco is a constellation of a serpent, Regulus is a star in the constellation Leo, and Bellatrix is a star in Orion.
Yes, it is! His brother Regulus and cousins Bellatrix and Narcissa are also named after stars in the sky, Draco Malfoy and his aunt, Andromeda Tonks, are named after a constellation and a galaxy respectively.
In the civilization(s) that noted the constellation as a Bear with a long tail...Maybe there WAS a bear species with a long tail then and they've since died out (likely killed off by humans)? Though there would likely be some evidence of this somewhere and I've never heard of a long-tailed bear. Just a thought. More likely artistic license, of course.
I've always heard that the story behind Ursa Major's tail is that she was was thrown by her tail into the sky as a punishment from ancient (Greek, I think) gods.
I bet when you don't have tv, books, internet, or anything to look at all night long besides your fire, the people around it, and the sky, you come up with some pretty interesting ideas and stories about the sky.
You are just amazing. I’ve watched many videos about stars and listened many astronauts but no on can explain every details like you doing in just one video not even 20 minutes . I’m obsesses with you ♥️
I've been looking forward to another episode of this series! Funny I checked so soon after it got uploaded :) Really can't wait to watch the entirety of this series, Astronomy is one of my biggest interests.
two weeks ago we had a nation wide blackout in my country that lasted for 12 ours... I rushed outside to finally see the sky as it should look... it was completely covered by clouds!!!!
It's incredible how stars become much more visible in a full dark night sky. Unbelivable for a person like me, who always lived in city. D: Thank you for showing us this beauties! : )
The major Bear has a tail on purpose! You see, there's a myth that Zeus put his "colombina" who was turned into a bear to the sky. And while he was pulling her he stretched her tail. I knew that since I was a kid and watched a presentation in our local planetarium.
I am being very honest this is an excellent series and I am even noting down all the points and watching all the videos 3 to 4 times in order to completely understand them and I am an Indian but still I am able to understand this accent because my English is good but there are many other people who are unable to understand your accent. I am not blaming you. And also I am thinking to make a channel on Astronomy in which I will specify the same points and I will speak in British accent so that other's can also understand. Thank you very much for increasing my knowledge to such an extent
Thank you very much for making this video, Phil. I though it was really interesting to learn about how stars appear to be moving on the sky and in which patterns they move. I live pretty far North. I live in Sweden a bit south of Stockholm but the terrible thing is that I live in a city, although it’s pretty small compared to bigger cities in the world like London, New York and New Dehli (in Norrköping, there are only ca. 140 000 people) light pollution is a BIG problem. I can barely see _any_ stars at night and it really pisses me off. This is probably the worst thing with living in the city, although the street carts here are pretty good...
***** Well, I guess I should be considered lucky. According to _Wikipedia_ (goo.gl/3MxfUZ), the population density of the Netherlands is the 31 highest in the world but Sweden has one of the lowest, being in the 197th place in the table. Sometimes, one wishes that one lived in Suriname: it has one of the lowest population densities in the world and lies very near the equator. This makes it the perfect spot for star gazing, you don’t have to worry about light pollution and you can see both the ‘North’ stars and the ‘South’ stars. It could also be a good place for you to visit since you already speak the language: Dutch. (goo.gl/BFKjbc)
***** Yes, Greenland maybe, or Iceland! Greenland is very cold whilst Iceland is a little bit warmer. Now that I think about it, it’s probably better to go to a country that is really far North or really far South on the globe, like Iceland or Australia, in order to see the Northern or Southern lights. The family of a friend of mine lives in a cottage 42 km from town, on the countryside. Honestly I don’t visit him that often nowadays but when I visit him and when we stay late, the sky is beautiful! You can see very many stars, if not all of them. It was there I first discovered that the stars in the sky move though the night.
***** Actually, I have never been to Iceland but I really would like to! The nature! The skies, the language! The music! Oh, I love it all (except for the former prime minister that stole money from the people but that’s a story for another time). After finishing learning Russian and German (in a few years), I plan to learn Icelandic and when after I graduate from a university (maybe in 2026 at the latest), I plan to move to Iceland or at least take a LONG vacation there. I imagine spending the nights studying the stars and the days studying Icelandic. I am 14 years old now and I want to work with theoretical physics when I get a little bit older, I think it will be astrophysics or cosmology. I am also very interested in linguistics, the study of languages, so learning different language will be my hobby. Yeah, that is what I plan to do in the future. If you don’t mind me asking, how do you imagine astronomy or any astro- subject being a part of your future life?
Really effective video! The visuals and narration blend easily,and the information is so absorbing that I couldn't believe the episode was coming to an end. Very excited for episode three!
Really liking the series! One request: can you get some animations or a model to show the celestial poles? I think it would help to understand the different amounts of movement we see from different stars in the sky
Seriously, thank you for doing this. I was thinking the other day how bummed out I was that I really could use a refresher on astronomy. That was my favorite class so far in college. You explain everything rather clearly and in an interesting way. Also, Thought Cafe's work is beautiful as always.
What if we lived on the very last star of one of the spiral arms.. Would there be a large dark void in one side of the sky? What would the milky way look like in the sky, looking at it from the 'very edge'?
The video has reminded me of the very basic information about astronomy that I tend to forget and has also given me a greater insight as to how the sky looks in different regions and environments. I also like how nice the whole mood and theme of the video feels. This is my first time in this part of crash course and so far I like it.
terralynn9 Thanks for the answer. Maybe it's just the crappy laptop speakers I'm using here but I don't hear the fifth note. Or better, I don't hear the fourth note. I just hear a whole tone upwards, a major third down and then a perfect fourth down. But if there was an octave drop in between, that would make the last tone a perfect fifth upwards which is indeed the sequence from Close Encounters.
I just had a look at the spectrum. I'm pretty certain there is no octave in the melody. It's D6 E6 C6 G5 where it should be D6 E6 C6 _C5_ G5. However, It _is_ the same tone so maybe Thought Bubble felt like they could simplify the sequence in that way. Either way, I find it really interesting that you heard that because to me it sounds and feels really different without the octave drop, even though I can totally see how one could argue that it's the same melody. Fun fact, at different times in the movie they play two transposed sequences: G A F F C and B♭ C A♭ A♭ E♭ (www.imdb.com/title/tt0075860/trivia?item=tr0659211).
I could really use a crash course on different constellations. My not quite 3 year old was engrossed watching episode 2 and asked for more constellations when it ended. He loves watching crash course videos and I love showing them to him. 😊
Hi, I'm from Brazil and want to know how you guys put the Portuguese subs present in episodes 1 & 2. I wanna collaborate with the subtitles production to reach my friends on Brazil with this GREAT science content.
Refraction causes the light to bend slightly as it passes through the atmosphere. In introductory physics courses we sometimes model the atmosphere as distinct layers with different optical densities to find the actual position of star above the horizon. The actual atmosphere is a little more complicated, the change in density is a continuous dropoff, close to a decaying exponential, but the model works and would work better as you make the thickness of each "layer" smaller and smaller (the fundamental idea of calculus). However, the turbulence in the atmosphere is what makes the position (very hard to detect because it is very small) and the brightness to vary with time. That is the main source of "twinkling" as the apparent variation of brightness of an object in the sky. But "twinkling" is not that big of deal and planets also twinkle, especially when they are low on the horizon and you are looking through more atmosphere than when they are directly overhead. The thing that really distinguishes planets (aka "wandering stars") from stars is their motion relative to the background stars over time (days, weeks, and months). The "planets" appeared to "wander" through some constellations (the zodiac) throughout the year while the "fixed" stars maintained their positions relative to the other stars. I've had this discussion with multiple astronomers and we usually end up "disagreeing agreeably".
Hi, I really really REALLY love and appreciate the revision with hyperlinks at the end of the talk. Imho it would be truly welcomed in all of crash course
Wow. This was incredible. Just a few mentions of how the stars move relative to us has given me a pretty good idea about how to chart directions using the stars... Not that I'm a professional or anything but I'm already grasping the idea pretty well
When you spoke about light pollution I remembered when I heard about when there was a blackout in a big city and all the lights went out, the police station kept getting calls from people freaking out about the "big colorful streak in the sky".
It was the milky way.
hahlol
I'm not surprised. By now at least 95% of humans not only keep their heads down to the ground but burying their faces in their electronic toys. That's probably they're afraid to look up. The sense of wonder is fading away for some.
Yup. LA.
typical californians
two weeks agot we had a nation wide blackout in my country that lasted for 12 ours... I rushed outside to finally see the sky as it should look... it was completely covered by clouds!!!!
We should have a national holiday where, for one night, cities turn off most of their lights, enough to ward off the light pollution, but still keep things operational.
Like Earth Hour?
I actually heard that a blackout in Los Angeles caused panic when people saw the Milky Way for the first time
Aww shit, I just realized that during the blackout after Hurricane Sandy, I could've done some skywatching, but instead I went inside cuz bugs
Joseph Schmitz yeah, there were also a few blackouts in New York, most recent 2003, one of these day's I'm going to go out to some rural place and have a look at the milky way.
David Lam INTERnational :P
Joseph Schmitz yup. people called the police because they saw "strange clouds" hovering above them
I went to Death Valley, CA this week, which is known for the best place to see the Milky Way here in southern California...I screwed myself over by not checking the Moon Phase and it turned out it was a full moon on the night I was there. The moon was SO bright we couldn't see the Milky Way as bright as we'd hoped. Anyone thinking of star gazing, check your moon!
Good advice. Thanks.
When I grow up (I'm 14 now) I want to be an Astronomer, my friends laugh at me and say that it's not a real job, and that I will not amount to anything if I try to follow this dream, idk why I'm posting this but if you also have this dream don't give it up because your so called friends say it's stupid, Astronomers play an important role in today's society, so get out there and achieve your dreams, as I want to achieve mine!
I completely agree, I'm currently 13 and my dream is to become one too. I feel like the future of humanity depends on it. Astronomy is so unique and different from most fields because you study something that is unknown. I really hope that I get my dream job, it's not even about the money or whatnot, for me it's the passion and just knowing something that is truly beautiful and amazing.
+Alecx Gwynn All my life, I've wanted to be a doctor. Last month, I was watching an Astronomy video about the Solar System. My dad noticed how intrigued I was by the video. I was literally putting my face in the screen. It took me 13 and a half years to finally figure out what I really wanted to do. I wanted to become an Astronomer.
True Life Story
+Alecx Gwynn +Lyn Akiyama +Masnoo A I hope you be astronomers and I be something close to that :D Good luck guys
+Alecx Gwynn You well definitely be an Astronomer and don't let them tell you that you can't
+the scientist
I hope so! Thx for the boost of confidence!
I want to learn so much about the space. It gives me chills when I learn something new in this topic. This subject is so vast yet interesting. I could work for NASA as a scientist if given an opportunity for free.
How did you learn astronomy?
Dasarath Dassanayake UA-cam is a good place to start, always ask questions, be curious, and be really good at math and science
I have only great things to say about this series. I love the more sober and chill atmosphere. I can only suggest you try more shows with this tone.
I know! Most of the crash course Chemistry videos feels so fast and rushed, Phil is a lot more relaxed.
Space kind of has that vibe, I've noticed. When you look at the sky for a living, it seems calmness becomes part of you. See: Carl Sagan.
Kevin Stitely I kinda had the opposite reaction, this guy talks a bit too slowly for my taste. Fortunately I can just speed him up to 1.25x normal speed, I do love that UA-cam feature.
Meg Ashley How?
Greg Miller See the settings gear, just to the left of the button that lets you change the size of the UA-cam screen? Speed is a setting you can change there, from 0.25x to 2.0x regular speed.
Great, now I want to go take a vacation in a dark, remote place somewhere along the equator. >>
Look for mountains in arid regions. Drier, thinner air helps, and nobody wants to live on a mountain in the desert. That why so many observatories are in Chile; the Atacama desert has high mountains and is the driest place on Earth.
+Twosocks42 Me too!
***** Will there be candy?
Somalia
+Twosocks42 come o jasper alberta, dark sky preserve and a great way to see the northern lights
Delphinus is my favorite constellation...
5 Stars!
"Uranus is right on the edge of visibility" -Phil Plait, 2015
I love you
sirspamalot3 ok...
OH GAWD
( ͡° ͜ʖ ͡°)
Darn! I was about to write that joke in the comments section. Two years too late :'(
This was so interesting! Light pollution really does suck - I grew up in NYC, so I basically never saw a single star. In my late teens I'm living in NJ and on a good night I see only a couple of stars (like maybe 5). It fascinates me that people live in places where they can look up and see that many stars every (clear) night. Hopefully one day I'll experience that in person :)
That was crazy to me too. I knew that people in more rural areas saw more stars in the sky but I always thought it was to do with how much light at that time and not a long term thing or even the extent it was hindering our view of the sky. Being from Vegas where Paradise has what are probably thousands of lights going up into the sky, the difference is huge.
I live in NJ too. Stupid New York, your lights do NOT inspire me!
Will Black yeah it's just something I can't wrap my head around - being able to step outside every night and there are more stars then there is black/orangeness.
Alanna R. hahah I can't imagine living further from the city though! I love living in crowded places. Rural places kinda scare me a bit.. so does the open starry sky because it makes me realize how insignificant and small we are to the rest of the universe.
Imagine all the morons that call 911 because the whole city has a power outage, seeing strange flickering lights and multicolored clouds in the night sky with absolute clarity and not knowing what they are. (That has actually happened)
Why so Sirius?
Lmao potter heads like me everywhere
+Jsidhu762 Sirius missions in The Martian :V
You serious?
+Ed Kelly thats no moon...
I see what you did there😉
I'm glad my eyesight isn't good enough to see Uranus.
Yu can't see it even with binoculars
+Cruzer Hahahahaha.... very sharp!
so do you have to be normal. or do you have to be farsighted? in order to see uranus?
+Mingyang Wang I've already seen Uranus (Insert lennyface here)
I want to be an astronaut, I'm doing well at school but I don't think that's enough, ik its difficult and unlikely but space just fascinates me so much
+katie jane you know you can choose what ever career path you want and still make space part of it ; I mean take whatever field come to your mind and search about it's relation with space you will find it related .
EVERYTHING in our life is related to the space but they don't teach you that in school ; even ECONOMIC has a lot to do with space .
Reema Issa Yeah I suppose, and no matter what I do I can always have space as an interest outside of my career :D
Katie that's not what Reema meant. Reema meant that if you're interested in space you don't necessarily have to be an astronaut to make space part of your career. You can be an engineer, a computer scientist, a biologist, a economist, a business person - anything - and still pursue a career in space; especially given how a good number of private companies have emerged in the space industry.
We will need all sorts of expertise - engineers to implement technologies to get us into space, around space and build facilities in space, biologists to examine the growth of crops/animals in space, psychologists to study the effects of space on human behaviour, economists to incorporate the space economy into the traditional Earth macroeconomy, lawyers to work on the new legal challenges that space will bring... etc. You get the idea. Stay open!
i feel you man, i live in asia and i want to be an astronomer but we have no space agencies down here.
It’s easier to learn about space in these videos than in class because no one will SHUT UP and I can’t learn. Your a life saver!
Is it sad that I've learned more from crash course than I have from school?
EDIT: Wow that’s a lot of likes! Four years later and here I am still looking at crash course for school help. Stay safe during the quarantine everyone ♥
It's probably because the guys who do these are far more interesting then your average teacher. I learned more from 7 episodes of the Biology playlist than I did from 2 months of biology class.
I learn more on Internet than all my school life and it's not sad. Just keep going until you get to a school you can learn much
Same stuff happens to me. It sucks.
Well, one, teachers don't exactly have lots of chances when it comes to outakes. Teachers also have to keep a group of people under control. Teachers aren't exactly entertainers, for example, teachers can sound boring as they have to work almost 12 hours a day, prepping work and activities. Finally, a teacher can't really talk at you for 50 minutes, both you and the teacher will get bored.
That might mean that either you learn well from crash course, or that your school doesn't teach you well. Or both.
"Nudity is not required"
*Sadly puts shirt back on*
It's not "required" so it's okay to stay in your birthday suit.
i stilll have no idea how they got a Pegasus from a square
+Ona Onye I don't get Pisces
+Nanni Narayanan :D That was good! Sure, at those times people were more creative because there weren't schools and places they could learn, they didn't know so they had free time because no technological stuff was invented and they could think more! :D
Nanni Narayanan Oh, you're a musican then! I like music and play the violin but in my school, there is no music lessons :(
+Nanni Narayanan Well, actually I'm in Turkey, so that's some hard just... don't worry about it, change will be in time, I improve myself, I know it's hard but I'm trying to do my best :)
+Nanni Narayanan Oh, yep! Music is always good, it improves brain, getting you relaxed, have fun and it's aa good hobby!
As a two time Alaskan fisherman I can attest there are still places you can see the sky in all its glory. 5 miles off the Aleutian islands there is no light pollution. You can't see your hand in front of your face. You can see the sky the way our ancestors saw it. The nights when the ocean was calm and reflected the sky are the nights I will never forget.
Thanks a lot ! I'm not learning this for a test, I just wanna discover the universe that I happen to be born in !
You mean there are other universes?
@@adarshtiwari4256 possible
This is my favorite series by far. It fills me with joy and happiness.
DON'T TELL ME HOW TO STARGAZE!!! I'LL STARGAZE IN THE NUDE IF I FEEL LIKE IT!!!
I went outside nude complete with bare feet at night once to check on the progress of a lunar eclipse. I stepped on a banana slug. After hopping back into the house on one foot and taking over a half hour to clean the slime off, the totality was over. At least wear shoes!
Lincoln Maurice
I can't do anything around YOU, Lincoln?!?!
Lincoln Maurice
; -)
The funny thing is, in some circles, being naked under the sky is known as being "sky-clad". Some people think that it has mystical significance. Still cold, though.
***** im a terrible person. Im sorry
I love ur videos, I am a 13 year old arabic boy who studied english in the best seen way(by me) and ever since I looked wt the moon, I always and still are dreaming of becoming an astronomer, u made me realize that ever since that moment, I was an astronomer, astronomy is my favorite out of all, u are helping me study it, and I thank u so much for ur job, I still want to see even beyond, maybe even study andromeda, but our generation is way behind that of a path, I never seen a clear sky with no light pollution, but I will see it very soon, thanks to ur info, im looking more into ur studies. Hoping ill become an expert...
Even in small cities you can´t really see the sky, the first time I got far from the city and saw the bright cloud of stars and the glow behind them I wasn't sure what I was seeing, I mean, I knew it was the milky way, but pictures in school books don't come close to preparing you to see it, it was f'ing epic, no wonder why ancients believed in gods and magic...
I'm rewatching the full course for the third time. This is a master piece!
Here in Houston we have a whopping total of 48 stars in the sky!
As someone who has never studied any astronomy before (or at least not since primary school), I'm loving this so far, especially this episode. Really clear and easy to follow, but I still feel like you covered a lot! ^^
Best channel ever- now with the best topic ever.
Not wanting to mention Earth in the list of planets able to be seen by the naked eye?
What's your problem?
You're supposed to be looking up I think.
***** I live in a cave, earth is all I see up there.
You can't see an entire hemisphere of the Earth while on its surface.
Not counted, but definitely mentioned. 7:07 Listen before you rant. :P
I heard it. Was poking fun. Being able to see earth with the naked eye is taken to be given.
The main disadvantage of living north of the Arctic circle is that I never get to see the summer constellations, but on the flip side, I do get to see the winter stars pretty much as much as I want. (Also, when I lived in a larger town for a while, I did notice that the sky appeared darker because of all the light pollution, and that I struggled to find a lot of the familiar constellations I'm used to seeing here.)
Fellas, I applaud you from the bottom of my heart for putting all these vids together. I'm slowly making my way through all of them in my spare time. Loving it!
Thank you! I love this series 🤩💗💞
Phil, you have this wonderful, natural thing that any entertainer/educator needs: you make me smile.
Great series!
These are really interesting so far. Thanks for taking the time to do this
This is why I sometimes think the, 'crash course,' approach has drawbacks. All this information about naked eye observation was correct, BUT, I have two problems.
1) The presentation failed to stress certain in order of avoid confusion. For example, he said that at the North POLE you'll never see stars in the southern hemisphere. But zero of the viewers live at the North Pole, and because it went by so fast, with no special stress, I'll bet many came away thinking he said, that in the northern Hemisphere, nobody sees stars from the southern celestial hemisphere... which is totally not true. Depending on your latitude, you DO see stars from the opposite hemisphere at different times of year.
And this leads to my second problem...
2) Because this is a, 'crash course," the subject of naked eye astronomy will never be visited again. This means that the above example of north south dynamics will never be touched on again... which is a shame. Because THAT'S where all the confusion lies for people, and THAT'S the stuff teachers never explain, leading to generation after generation of people who end up not caring because it all seems too confusing.
Another example: He mentioned that Polaris never appears to move all night long. We've heard that before. What he failed to mention was that Polaris never appears to move (from whatever latitude you're observing from) all YEAR long.
And that would've been a great starting point to explaining why at certain times of year we see different constellations at night... because we're in different parts off our orbit, which means different parts of the sky are blotted out by the sun each day, and revealed each night... DUE TO THE FACT that Polaris can never move... because, angular momentum.
That would've been educational. Instead, this was just regurgitating stuff that has been taught since forever and will never lead to anything but the same confusion among the public.
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I don't think you're really wrong as much as "throwing out the baby with the bathwater," simply because this isn't exactly what you wanted it to be.
To your point 1, I think there was some stress given to it, but I would have liked if Phil had said something like "and if you live somewhere in between, you see something in between." But to the second point, I think you need to give the show some benefit of the doubt here. They haven't touched on the seasons yet. The episode was mostly focusing on what you could see in the sky in one night, and it would be a little out of place to just throw the seasons in there. I think in future episodes (maybe the next?) they'll get to the seasons and the axial tilt of the earth, and that Polaris doesn't appear to move, AND the precession of the Earth, and how Polaris really does appear to move in the sky over very long periods of time.
From what I've seen of other Crash Courses on this channel, they do refer to previous material; I think John even mentioned something from CC World History in CC World History 2. It may not be the case in this series since it's a different host, but we should give them the benefit of the doubt.
killahtizoe He said over the course of a whole day, all the stars would be visible. There is a big difference between saying you can see all the stars, and the time it takes to see all of them.
I think your point 1 is kind of a stretch. You are assuming you know what others will think they hear/understand. For example, it never entered my mind to conflate the north pole with the northern hemisphere.
As to point 2, you are assuming you know what the rest of this series will be about/talk about.
It is true that these crash courses can't touch on everything...hence 'crash course'. Its to get you interested and maybe go and learn more.
Dark Sky Society sounds like a metal band or a group of batman villains.
Just noticed the LEGO Millennium Falcon in the background. LOVE IT!!!
Great video!
I love how you don't seem to be hurrying up like how others do in this channel. It makes it much more easy to understand.
im making this into a playlist
0:50 - Close encounters theme as the stars appear. Well done, Crash Course, well done.
Sir, thank you so much for this. I love all crash-course videos, specially astronomy and history.
Loved it!
Cheers!
"sirius, the dog star" OMG IS THIS WHERE JK ROWLING GOT HER INSPIRATION FROM?
Yeah .. Potter head
There are a bunch of names with astronomical origins. Draco is a constellation of a serpent, Regulus is a star in the constellation Leo, and Bellatrix is a star in Orion.
In arabic we call it ''el sha3ra'' and we have an astronomy foundation called as this brightest star and i test on it ( i am just 15 )
@@AndrewJGaming all the black family members have astronomy inspired names i guess its a theme.
Yes, it is! His brother Regulus and cousins Bellatrix and Narcissa are also named after stars in the sky, Draco Malfoy and his aunt, Andromeda Tonks, are named after a constellation and a galaxy respectively.
In the civilization(s) that noted the constellation as a Bear with a long tail...Maybe there WAS a bear species with a long tail then and they've since died out (likely killed off by humans)? Though there would likely be some evidence of this somewhere and I've never heard of a long-tailed bear.
Just a thought.
More likely artistic license, of course.
you are very right the Prehistoric Dog-bear did have long tail
Bunny Happyjoyjoy At which point constellations didn't exist nor did anyone who saw said bear, or their grandchildren, so on, exist
I've always heard that the story behind Ursa Major's tail is that she was was thrown by her tail into the sky as a punishment from ancient (Greek, I think) gods.
I bet when you don't have tv, books, internet, or anything to look at all night long besides your fire, the people around it, and the sky, you come up with some pretty interesting ideas and stories about the sky.
thats why the sky looks so sad you only see few stars at i dont have fancy telescope world has way of making feel not alone
This series got me a couple points at bar trivia. Thanks and keep up the great work!!
Loving this playlists! Phil's voice is soothing and informative it's even relaxing to learn with him 😊
God I love these series already feeling giddy with all this information 😊
Phil your a brilliant presenter ! I've learnt so much from you
You are just amazing. I’ve watched many videos about stars and listened many astronauts but no on can explain every details like you doing in just one video not even 20 minutes . I’m obsesses with you ♥️
I've been looking forward to another episode of this series! Funny I checked so soon after it got uploaded :) Really can't wait to watch the entirety of this series, Astronomy is one of my biggest interests.
two weeks ago we had a nation wide blackout in my country that lasted for 12 ours... I rushed outside to finally see the sky as it should look... it was completely covered by clouds!!!!
Man, I hope I get to see the full majesty of the Milky Way with my own eyes someday.
Love this show. It's different from the other Crash Course shows. And it's really insightful, plus, EDUCATIONAL yet INTERESTING
The crusaders hitting themselves on the head with maces made me laugh
It's incredible how stars become much more visible in a full dark night sky. Unbelivable for a person like me, who always lived in city. D:
Thank you for showing us this beauties! : )
The major Bear has a tail on purpose! You see, there's a myth that Zeus put his "colombina" who was turned into a bear to the sky. And while he was pulling her he stretched her tail. I knew that since I was a kid and watched a presentation in our local planetarium.
This is incredibly well done. Congratulations (and thanks) to all involved.
I'm so glad they edited out him breathing between sentences, I don't want to wait half a second to hear the next thing he's going to say.
I am being very honest this is an excellent series and I am even noting down all the points and watching all the videos 3 to 4 times in order to completely understand them and I am an Indian but still I am able to understand this accent because my English is good but there are many other people who are unable to understand your accent. I am not blaming you. And also I am thinking to make a channel on Astronomy in which I will specify the same points and I will speak in British accent so that other's can also understand. Thank you very much for increasing my knowledge to such an extent
A good comment
The sound of the telescope moving at 5:30 is the same noise used for the cannon being deployed in Super Mario 64
Just recently I became very interested in astronomy so I'm very happy that you guys are starting a new series on it! Keep up the good work!
I love the reviews at the end of each video
7:00 -- due to change in refractive index due to change in density on atmosphere
Thank you very much for making this video, Phil. I though it was really interesting to learn about how stars appear to be moving on the sky and in which patterns they move. I live pretty far North.
I live in Sweden a bit south of Stockholm but the terrible thing is that I live in a city, although it’s pretty small compared to bigger cities in the world like London, New York and New Dehli (in Norrköping, there are only ca. 140 000 people) light pollution is a BIG problem. I can barely see _any_ stars at night and it really pisses me off. This is probably the worst thing with living in the city, although the street carts here are pretty good...
***** Well, I guess I should be considered lucky. According to _Wikipedia_ (goo.gl/3MxfUZ), the population density of the Netherlands is the 31 highest in the world but Sweden has one of the lowest, being in the 197th place in the table. Sometimes, one wishes that one lived in Suriname: it has one of the lowest population densities in the world and lies very near the equator. This makes it the perfect spot for star gazing, you don’t have to worry about light pollution and you can see both the ‘North’ stars and the ‘South’ stars. It could also be a good place for you to visit since you already speak the language: Dutch. (goo.gl/BFKjbc)
*****
Yes, Greenland maybe, or Iceland! Greenland is very cold whilst Iceland is a little bit warmer. Now that I think about it, it’s probably better to go to a country that is really far North or really far South on the globe, like Iceland or Australia, in order to see the Northern or Southern lights.
The family of a friend of mine lives in a cottage 42 km from town, on the countryside. Honestly I don’t visit him that often nowadays but when I visit him and when we stay late, the sky is beautiful! You can see very many stars, if not all of them. It was there I first discovered that the stars in the sky move though the night.
***** Actually, I have never been to Iceland but I really would like to! The nature! The skies, the language! The music! Oh, I love it all (except for the former prime minister that stole money from the people but that’s a story for another time). After finishing learning Russian and German (in a few years), I plan to learn Icelandic and when after I graduate from a university (maybe in 2026 at the latest), I plan to move to Iceland or at least take a LONG vacation there. I imagine spending the nights studying the stars and the days studying Icelandic.
I am 14 years old now and I want to work with theoretical physics when I get a little bit older, I think it will be astrophysics or cosmology. I am also very interested in linguistics, the study of languages, so learning different language will be my hobby.
Yeah, that is what I plan to do in the future. If you don’t mind me asking, how do you imagine astronomy or any astro- subject being a part of your future life?
***** Oh, sorry for my settings. I will do!
Robert Andersson me too
With your nice oration skill U covers double of content in half the time....gr8 teacher...
an ad for binoculars popped up literally right when he said "no binoculars"... targeted ads at their best.
+yoto sun Google...
+yoto sun I use ad block so I don't see it
Robert Podruzny pay for it? Why would you have to pay for it?
Robert Podruzny i have never seen paid subscriptions on UA-cam but kk.
Would CrashCourse Die if there is the lack of one person??
Really effective video! The visuals and narration blend easily,and the information is so absorbing that I couldn't believe the episode was coming to an end. Very excited for episode three!
North Korea must have incredible views of the sky. Apart from Pyongyang, it's pretty much all dark.
MicrowavedCarrot, I don't think North Koreans are allowed to stargaze. They're not allowed to do much.
Of course, North Korea has the obvious downside of being a totalitarian dystopia.
dude, i know you have only just started presenting, but i thinl you are doing awesome! i am truly excited to go on this astronomical journey with you!
"Uranus is right on the edge of visibility"-TWSS
Phil is so lucky. He has the coolest intro song of all of the courses.
Those forearms are inspiring.
i just decided i wanted to become and astronomer and so im watching your vids to start off, the yare really helpful.
You wear glasses, Phil Plait so how do you do naked eye astronomy?
Really liking the series! One request: can you get some animations or a model to show the celestial poles? I think it would help to understand the different amounts of movement we see from different stars in the sky
Thank you, I have to test out of a course. There is so much to learn although I love to watch Neil DeGrasse Tyson this brings everything together.
I really like the way how it's all explained and also the way you talk! In comparison to John it's so calm and very easy to follow.
Seriously, thank you for doing this. I was thinking the other day how bummed out I was that I really could use a refresher on astronomy. That was my favorite class so far in college. You explain everything rather clearly and in an interesting way. Also, Thought Cafe's work is beautiful as always.
13 seconds into the video, putting my shirt back on before I'm told to leave the library. Again.
What if we lived on the very last star of one of the spiral arms.. Would there be a large dark void in one side of the sky? What would the milky way look like in the sky, looking at it from the 'very edge'?
+Hercules Rockefeller We'd see the galaxies maybe and probably we'd see an arm of the milky way
The video has reminded me of the very basic information about astronomy that I tend to forget and has also given me a greater insight as to how the sky looks in different regions and environments. I also like how nice the whole mood and theme of the video feels. This is my first time in this part of crash course and so far I like it.
0:53 I SEE WHAT YOU DID THERE. i like you thought bubble/ Crash Course.
I was hoping I wasn't the only one who heard that, too!
I neither see nor hear what they did there. What did they do there?
Penny Lane It's the five note sequence from Close Encounters of the Third Kind.
terralynn9
Thanks for the answer. Maybe it's just the crappy laptop speakers I'm using here but I don't hear the fifth note. Or better, I don't hear the fourth note. I just hear a whole tone upwards, a major third down and then a perfect fourth down. But if there was an octave drop in between, that would make the last tone a perfect fifth upwards which is indeed the sequence from Close Encounters.
I just had a look at the spectrum. I'm pretty certain there is no octave in the melody. It's D6 E6 C6 G5 where it should be D6 E6 C6 _C5_ G5. However, It _is_ the same tone so maybe Thought Bubble felt like they could simplify the sequence in that way. Either way, I find it really interesting that you heard that because to me it sounds and feels really different without the octave drop, even though I can totally see how one could argue that it's the same melody.
Fun fact, at different times in the movie they play two transposed sequences: G A F F C and B♭ C A♭ A♭ E♭ (www.imdb.com/title/tt0075860/trivia?item=tr0659211).
I could really use a crash course on different constellations. My not quite 3 year old was engrossed watching episode 2 and asked for more constellations when it ended. He loves watching crash course videos and I love showing them to him. 😊
he moves alot when he talks doesnt he? its almost... hypnotic
I just was able to see Jupiter, Saturn and Mars last night. along with Vega, Spica, and Polaris. Astronomy is awesome!!!
I watched this while I'm naked.
Me too 😉
me too (jk)
I was jk'ing
( ͡° ͜ʖ ͡°)
i wonder, what has lead us to this?
I love his voice, so calming.
Hi, I'm from Brazil and want to know how you guys put the Portuguese subs present in episodes 1 & 2. I wanna collaborate with the subtitles production to reach my friends on Brazil with this GREAT science content.
7:00 isn't twinkling due to refraction, as light passes through several media of varying optical densities?
Refraction causes the light to bend slightly as it passes through the atmosphere. In introductory physics courses we sometimes model the atmosphere as distinct layers with different optical densities to find the actual position of star above the horizon. The actual atmosphere is a little more complicated, the change in density is a continuous dropoff, close to a decaying exponential, but the model works and would work better as you make the thickness of each "layer" smaller and smaller (the fundamental idea of calculus). However, the turbulence in the atmosphere is what makes the position (very hard to detect because it is very small) and the brightness to vary with time. That is the main source of "twinkling" as the apparent variation of brightness of an object in the sky. But "twinkling" is not that big of deal and planets also twinkle, especially when they are low on the horizon and you are looking through more atmosphere than when they are directly overhead. The thing that really distinguishes planets (aka "wandering stars") from stars is their motion relative to the background stars over time (days, weeks, and months). The "planets" appeared to "wander" through some constellations (the zodiac) throughout the year while the "fixed" stars maintained their positions relative to the other stars. I've had this discussion with multiple astronomers and we usually end up "disagreeing agreeably".
Don't have a class to study for - just want to be smarter
This is so interesting and helpful for amateur astronomers like me! Thank you! Can't wait to see what comes next :)
damn light pollution, one of these days I'm going to go far away from the suburbs and cities, just to get a chance to see the milky way.
Congrats to the CC Crew on getting picked up by PBS
Where I live, the light pollution is very strong. It's really hard when I want to see a meteor shower.
go camping for a night
i absolutely love this! thanks so much and keep the great videos coming :)
Who’s here for online class 🙃
Hi, I really really REALLY love and appreciate the revision with hyperlinks at the end of the talk. Imho it would be truly welcomed in all of crash course
Nudity is not required? Damn, now I have to put my clothes back on!
i love you all at crash course. thank you all for this series.
I'll show you a naked eye observation alright.
Wow. This was incredible. Just a few mentions of how the stars move relative to us has given me a pretty good idea about how to chart directions using the stars... Not that I'm a professional or anything but I'm already grasping the idea pretty well