The Oort Cloud: Crash Course Astronomy #22
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- Опубліковано 8 тра 2024
- Now that we’re done with the planets, asteroid belt, and comets, we’re heading to the outskirts of the solar system. Out past Neptune are vast reservoirs of icy bodies that can become comets if they get poked into the inner solar system. The Kuiper Belt is a donut shape aligned with the plane of the solar system; the scattered disk is more eccentric and is the source of short-period comets, and the Oort Cloud which surrounds the solar system out to great distances is the source of long-period comets. These bodies all probably formed closer to the Sun and got flung out to the solar system’s suburbs by gravitational interactions with the outer planets.
Check out the Crash Course Astronomy solar system poster here: store.dftba.com/products/crash...
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Chapters:
Introduction: Where Do Comets Come From? 00:00
Kuiper Belt, Scattered Disk, and Oort Cloud 2:52
Long-Period Comets come from the Oort Cloud 4:03
Short-Period Comets come from the Scattered Disk 4:27
Pluto, Plutinos, and other Kuiper Belt Objects 4:47
Oort Cloud Objects 8:25
Review 10:38
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PHOTOS/VIDEOS
HD Long Exposure Star Timelapse vimeo.com/34172172 [credit: Jeffrey Beach, Beachfront B-Roll]
Fine Structure in the Comet’s Jets blogs.esa.int/rosetta/2015/01/... en.wikipedia.org/wiki/Protopla... [credit: ESA/Rosetta/MPS for OSIRIS Team MPS/UPD/LAM/IAA/SSO/INTA/UPM/DASP/IDA]
Artist's impression of a protoplanetary disk. [credit: ESO/L. Calçada - ESO]
Creating Gas Giants svs.gsfc.nasa.gov/cgi-bin/deta... [credit: NASA's Goddard Space Flight Center]
What is a Sungrazing Comet? svs.gsfc.nasa.gov/cgi-bin/deta... [credit: NASA's Goddard Space Flight Center]
Pluto/Neptune Orbit www2.jpl.nasa.gov/files/images... [credit: NASA]
1992 QB1 solarsystem.nasa.gov/multimedi... [credit: ESO]
Eris apod.nasa.gov/apod/ap060918.html [credit: W. M. Keck Observatory]
Moons of Pluto en.wikipedia.org/wiki/Kerberos... [credit: NASA, ESA, and M. Showalter (SETI institute)]
New Horizons Approach pluto.jhuapl.edu/common/conten... [credit: JHUAPL]
Moon svs.gsfc.nasa.gov/vis/a000000/... [credit: NASA/Goddard Space Flight Center Scientific Visualization Studio]
Pluto solarsystem.nasa.gov/multimedi... [credit: NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute]
Sedna’s Orbit commons.wikimedia.org/wiki/Fil... [credit: NASA]
Artist’s Conception of Kuiper Belt en.wikipedia.org/wiki/File:14-... [credit: NASA, Wikimedia Commons]
Kuiper Belt World (video) planetquest.jpl.nasa.gov/video/41 [credit: NASA Kepler Mission/Dana Berry]
Pluto Discovery Plates azmemory.azlibrary.gov/cdm/sin... [credit: Clyde Tombaugh, Lowell Observatory]
Science is like an addiction, the more you know, the more you want to know!
just like crack
Just like nicotine
Just like the reply section of this comment
Just like sniffing dotty nickers 🤧🤪😍
@@supaooze3600
Looks like i picked the wrong day to stop sniffing airplane glue.
my dad designed part of the New Horizons probe. We've been waiting for eleven years for the fly-by this summer; I remember being in high school and my dad coming in my bedroom and saying, "New Horizons has just passed Jupiter!" and then a few years later, in college, he said, "It's passed Neptune." It's a really exciting time for us!
No lie?
WOOOAAAHHHH
Amber Nelson What a fascinating planet it turned out to be -- not at all the boring, frozen ball of ice it was believed for so long to be!
Now its approaching the oldest and most distant object we've ever gone to. Bravo.
Yoooo that is AWESOME😍
You said you were going to leave Pluto alone for the moment. That was almost five years ago.
When I search for "Crash Course Astronomy Pluto" today, nothing appears.
Naughty!
This is by far the best Crash Course series.
Phlos Fysics Phan 42 yep
Phlos Fysics Phan 42, I think the same, too!!!
Phlos Fysics Phan 42 I have to agree especially since I absolutely can’t stand how Hank presents things. He talks way too fast. When you are watching a video that is about something you are learning about you need people to talk at a regular pace so that you have time to process the information and put it in your head. When they talk so fast it is in one ear and out the other because you didn’t have enough time to hold it in your short-term memory in order to transfer to your long term memory. I kind of wish this guy was a little slower talking but that is most likely an issue with myself and I’m sure most people have no problem with it. I really, really can’t stand Hank and it kills me to know the millions of dollars that he has made from making his fast talking videos.
far by baby corona virus baekke semapu
"Could we be seeing an object from an alien solar system?"
2 years later.
Oumuamua: "Well, hi there!"
New horizons update: PLUTO IS BEAUTIFUL
Awww, pre-New Horizons Pluto looks so incorrect it's adorable
Not nearly as incorrect is the fact that no comet nuclei we’ve ever pictured and feel free to go doublecheck in trying to be wrong as ever once demonstrated that it’s a dirty snowball they all look like hard sedimentary rock or volcanic rock. What we’re seeing here is nothing but pure theory passed off as proven science which is absolutely incorrect. Proven science and excepted science are two different things I have no problem with everything said here as long as you put in the statement theory these are not fax proven definitively what we’re seeing here is nothing but pure theory passed off as proven science which is absolutely incorrect. Proven science and excepted science are two different things!
@@jamesbellegarde2893 Handy life hint: If you want people to take your comment as a serious and intelligent piece, you might want to brush up on your spelling and grammar. That was annoying to read.
James Bellegarde Dude. Get Grammarly or something. You’re just embarrassing yourself.
@@jamesbellegarde2893 uuuummmmm no bro. Comets are definitely frozen gas mixed with other things , which is why they sublimate.
Marauder Gun Yes all the ones that look exactly like astroids and all the astroid that are “firing off Jets”are supplementing. Then you need to explain why the Jets go in the opposite direction from the sun sorry but your just sublimation theory is pretty much debunked, Not that any astronomer who built his career on the delusional big bang theory is ever going to admit that. Welcome to the age of plasma cosmology
It's fascinating to look back at these older science videos and realize all that we have learned since they were released.
5:00 - 6:05 this is the clearest explanation I have ever heard why Pluto and Neptune don't cross paths. Well done sir, thanks.
The title is fixed. Thanks everybody!
Yeet
It's strange to see this recent(ish) video that still has an artist's impression of what the surface of pluto might look like. Reminds you how awesome it is that we now have such a detailed look at the surface and that until very recently we had no idea really what it might look like.
azdgariarada
We still don’t...
*”ARTIST’S IMPRESSION”*
We're living in the second great age of discovery right now... :) OL J R :)
Geez, I’m only 50 yrs old and the solar system is so different then when I went to school. There was the nine planets including pluto. But we had to memorize all the names of the moons around each planet. Which was easy because there were only a few known at the time. What ever happened to the astroid belt? When I was in school they told us that we passed through it twice a year. I think it was about 3 months apart and during that time if you went outside you would see a lot of shooting stars. That must still be there between Mars and Jupiter because how could it not be. But what I don’t understand is why it is never, ever mentioned in any videos. Why don’t they ever mention it anymore? They talk about the kiuper belt constantly which barely ever effects us. Whereas the astroid belt you can go outside and see so many shooting stars while crossing it. Is there something about the astroid belt that I don’t know about?
This younger generation and the ones after it are so lucky to have current information on everything right at there finger tips. There was a time when you were at home and if you had a question you had to hope your parents knew the answer and being that older generations are less educated you probably didn’t get an answer. Your next option was to look in a set of encyclopedias. Not many had encyclopedias in their home because they were so expensive. You had to go to the library. However, by the time you usually made a trip to the library you had already forgotten your question. Worse then that is that the information on a particular subject in the encyclopedia was maybe a half a page in bigger font then we use today with a drawing or picture on the top half. That’s not a lot of information to know about your subject. When we did little research projects for school we always had to include a newspaper article as a source. Very different from today. Today’s technology is so wonderful and amazing. I wish I could live forever to see all the knowledge and technology that is still to come. I want to know what the next unknown-unknown will be. Sort of how electricity changed the world forever. There has to be more crazy physics out there that we just haven’t stumbled upon yet that will change the world forever again. And then again and again. So amazing.
I pray you can binge watch UA-cam videos like this that will help on your trek for knowledge. I pray you become or have CPU savvy so you can download and read a lot of .pdfs (books), and that you are led where to look for a new information.
Remember those days well... even though I was born in 1971. Back in the pre-internet days... when I was in school I read books about astronomy and planets and moons voraciously, and there wasn't that much to tell. There had only been flyby spacecraft to Mercury and Venus and Mars at that time, so most of it was artwork, and general information like day length of the various planets, their sizes, year lengths in Earth days or Earth years, and the major moons of the outer planets. Some stuff about their atmospheres or elements found there via spectroscopy or sketchy details about their surfaces of the moons or inner planets from radar astronomy, but that was about it. Pioneer flew by Jupiter and Saturn when I was in elementary school, but it took awhile for that information to disseminate. They were also pretty limited compared to the Voyager probes which were launched in 1979, which everybody was excited about. The pics we'd gotten back of Mars' surface from the Viking landers in '76 had been amazing, even though they couldn't move around on the surface. The photos and data sent back by Voyager was literally rewriting the text books and discovering new worlds, as what had only been sketchy ground-based telescope images and "artists impressions" or depictions by famous space artists like Chesley Bonestell (among others) which were beautiful pieces of art, but were just how we IMAGINED it looked... Voyager actually sent back snapshots that showed us REAL WORLDS out there in the darkness we'd never REALLY seen before! The instruments sent back data that told us about those worlds, details we'd never known before, and surprised us with things like Io's volcanoes... I remember a movie from about 1979 starring Sean Connery called "Outland", where he was a Federal marshal on a mining colony on Io, which was then thought to be a dead world like our Moon, rich in metals. Voyager proved that long-held view COMPLETELY WRONG with only a handful of photographs! It really was "discovering new worlds"... we'd known *forever* that they were there, but knew tantalizingly little about them; science surmised most of what we knew from distant observations. I remember well the anticipation of the Voyager fly-by's of Saturn, then a few years later, Uranus, and then finally Neptune. SO much was learned, it went from a couple paragraphs and a grainy telescope photo or artist rendering to whole books being written. Most of the libraries back then had surprisingly few books on the subject back then either-- some dated back to the 50's and 60's and had already had parts of them rendered obsolete from the Mariners and Pioneers and Vikings and Soviet Veneras and other such probes... When you were hungry for more, well, you took what you could get, because "pickin's was mighty slim"... Then we finally got the internet, and now with UA-cam and various online sources and services like "Great Courses Plus" and many others, you can literally learn more in an afternoon than most PhD's at the time knew back then...
It's amazing to think how much we'll be able to learn in the coming decades... and that we'll have a front-row seat to it, via the internet... (Unless a super-solar-flare sends us all back to the Stone Age electronically, or we manage to nuke ourselves...) Later! OL J R:)
Woah! That was long!
Firstly ,wow a boomer who doeaent hate younger generation ur awesome
Second, earth does not pass through the asteroid belt but quite a few asteroids can get to earth especially when the earth on its slightly but barly noticable elliptical orbit gets closest to the asteroid belt
"we were born too late to explore earth and too early to explore the universe"
I like these episodes. They're concise and not full of weird music drowning out the narrator like so many other space docs.
Aaah comets. Always knew they were something special, something.... out of the oortinary.
Gareth Dean yukyukyuk 😜😂
No
Oh good god ... Nice :)
A likely tail.
Congration. You done it.
This series rebooted my interest in the stars. For the first time in a decade, I waited for a clear night, went to a dark field and looked up. There's so much more to see when you know what to look for. Thanks crash course.
I wish/hope that they either update, or make updated videos for this series
Wow, the Oort Cloud is huge! We didn't learn the scale of the solar system back when I was in school; it's incredible to think about.
Still my favourite CC series. Phil is an excellent educator and host!
This guy is so awesome! Very good at explaining topics!
This is what I love about science, It's always changing. How exciting!!!
Your videos are AWESOME and there's unfortunately not enough of it, keep up the great work! :)
Phil you're one of my favorite space video dudes. Love the videos!
I took a lot of astronomy electives throughout my schooling, and these are still fascinating, thank you!
Another great episode. Loved the final monolog!
CrashCourse, this video is very well done. Great presentation, excellent clarity, and perfect density. Thank you.
The worlds greatest teacher. Your amazing man.
Here is what I think. They say the Oort cloud stretches about a light year from the sun. And our local star group are within a 10LY area, with the Centauris around 2LY away. So who is to say that say all the other stars don't have their own Oort clouds, and that all the "empty" space between stars is so empty after all? I feel that would give interstellar travel a much different realm of possability. All the possible resources, waypoints, and pathways could get us to other stars much easier.
I still can't get over how awesome this set is.
yup its 2019 and new horizons already passed pluto and ultima thule, not sure where its headed now but this is a great time for astronomy
I find the oort cloud really interesting.. probably because there is pretty much nothing known about that region of space, infact I just did a little search and this video pretty much seems to be the most informative about the subject whereas there are lots of videos about the planets etc. I hope you can cover this subject in even more detail in the future.
NichoTBE Let's hope that the new generation of telescopes (like The James Webb Space Telescope will help us understand the region better.
Great job describing the Oort Cloud ☁️
As always, very good and a pleasure to watch!
I dread the day this series will end.
Viktor Nerlander Maybe season 2 will happen
whiteflagstoo Yes please
Viktor Nerlander the universe is infinite, the series is therefore also infinite.
They could probably do some stuff on Exoplanets and possible Earth Like planets (which is what most astronomers are interested in, naturally).
monkeytrollu I guess the series has only really touched on the Solar System at the moment, there's still plenty more than that in Astronomy!
Even Andy My prediction was right, they are now doing exoplanets :)
"Leave Pluto Alone" image. LOL! Priceless.
Got my copy of this script today ... thank you Project for Awesome, Phil Plait, Hank Green and all involved.
CrashCourse I was really looking forward to this episode!! I love this series!
Anyone else anxiously counting down the days to New Horizons reaching Pluto? I can't wait!
PokeZelda6664 It's very soon. I'm excited!
PokeZelda6664 I've been talking my wife's ear off about it.
PokeZelda6664 I can't wait myself.
PokeZelda6664 Holy crap I'm getting a buzz every time I get news about it since 2013! I'm getting so excited as the days go by. 14th of July I believe is the time we'll get data for the first time
PokeZelda6664 This should be worth a new day of celebration once it reaches. Day of New Horizons maybe!
This was the episode I've been waiting months for. Glad you made it! I do wonder though how we keep contact with distant spacecraft like New Horizons. A signal from that far away must be very faint and there's a lot of background noise to filter. Perhaps it's an idea for a new episode to talk about probes like New Horizons, or STEREO A and B?
I love how not only facts, the products of research methods, are described, but also some of the methods themselves.
I friggin' love this crash course series. Nice work, guys.
Thank you for not even bringing up the "debate" about Pluto being a planet. I thought you did an excellent job of explaining how, as a Plutino Kuiper Belt object, Pluto acts very different than the known eight planets.
Steve Lovelace you are much younger than me so you don’t realize what it’s like to have Pluto be a planet for most of your life and how heartbreaking the whole ordeal is. We were taught that it’s orbit was no lined up in the plane of the rest of the solar system. Pluto didn’t even have a discovered moon. And some of it could be because for most of us that learned and knew pluto as a planet for a such a long time were also the children that only had cartoons to watch on Saturday mornings from 8am-11am (that’s all the tv there was for kids) and we all watched Disney and loved Mickey Mouse’s dog, Pluto. I’m sure that is subconsciously. It’s just like when they decided peanuts weren’t nuts but legumes. Or that tomatoes are fruits. Or that your dad isn’t your real dad. It’s a really hard, cold world out there....lol
Also I hope you see the irony and ridiculousness (not meant meanly) of your comment. The subject finally goes unsaid and then there is that person who has to bring it up because they can’t help themselves. But seriously, I know how you feel. I feel the same way when every science thing you are watching has to bring up climate change. We are bombarded with it so while watch a science thing about something else it doesn’t need to be forced in there. We know! Have a great day! Take Care.
I hope they do a dedicated episode about Pluto in a couple months after we have some time to analyze the new data we'll have by then.
Simply fascinating and Kudos to Thought Cafe. Cool graphics.
Hearing that there is so much more to explore of our own system is a bright spot in my week of pretty bright spots. Makes the rocket scientist in me delight.
That shirt is out of this world, among the cloud of Oort 😎
I remember when we still thought Pluto was Neptune's escaped moon. Innocence: lost.
I actually knew most of this stuff. Thanks, Bill Bryson!
I'm so into this series!
Request!: Another video summarizing some of the information from New Horizon's visit to Pluto and what the implications of this are.
I am addicted to these videos, they are awesome! Thank you for making these.
I do have a question related to one of the proposed theories in the video (I know they may have found evidence of another planet, and that that theory is becoming popular since this video was created, but assuming that is not the case for the sake of the argument):
Specifically related to the theory that the Oort cloud has so many more objects than were theorized to exist due to our sun stealing from other stars: wouldn't that be balanced by other stars stealing objects from our sun? Wouldn't it be more of a two-way exchange than a one-direction theft? I would think that over time the number of objects would still remain closer to what scientists calculated assuming this scenario played out (our sun passing by other stars and stealing objects) and there was no other variable (like another planet). In this theory, is it assumed that our sun is much more massive than the other stars? If so, wouldn't that require many smaller stars for us to come into close contact with?
Either way, even with an additional planet, wouldn't we need the material to still come from somewhere in order for us to steal it?
What if our sun flew through a nebula or some kind of gas / dust cloud? I imagine there are probably some larger objects than dust particles in those clouds that could easily be grabbed by our sun. That would also explain the spherical shape as opposed to the ring shape.
I'm just curious. Thank you again for creating the videos.
Thanks. Loving it, just like I loved reading scientific mags as a kid(almost 40 years ago).
Are there plans for another CC astronomy episode to discuss what New Horizons discovered?
Come back and tell us about Pluto!
Your videos are excellent and you’re a great narrator.
And now Planter Nine! Great job!
Yay :D We will finally know if Charon isn't somehow a gaint piece of Alien technology :D
Fighting_Hussar And if it is, we'd be able to finally travel at FTL speeds to other parts of the galaxy!
Cuckoo Phendula And find an alien robots who want to kill us all :D
JumboCod91 But the colour change dude xD So unique xDD
JumboCod91 more importantly, that'd mean asari are real, so it doesnt really matter
Tjag321 Well when Asari and Quarians are included (Ok I might be freak but also Turian females are hot O.o)
then
fuck her right in the pussy xD
I think the invisible planet in the Oort Cloud is
*cue dramatic music*
The Death Star
Will Gallagher dude are you for real??
Will Gallagher wait !!!! Why not Etheria? (It’s wayyyyy worse - form she-ra and the princesses of power)
Masde of ice
Thank you very much it is interesting and oriented towards scientific knowledge.
This is so cool :) Kuiper Belt > Scattered Disk > Oort Cloud
I imagine they changed the order to get this out before new horizons gets to pluto in a couple weeks
***** Might make sense. If this is supposed to be #22, the 2 is below the 5 on the number pad. Could have hit the 5 by mistake.
Their might be a dwarf sun out in the oort cloud as well, something like a brown dwarf or
Thank you very much for making this video, Phil Plait and the others at _CrashCourse_ Astronomy! It was really interesting to hear about the Oort cloud, the Kupiter belt and the fantastic number of objects in those. I believe it is really intriguing how our sun, Sol, maybe a thief that has stolen other planets!
What has happened since this episode? You mentioned a 9th planet, how has the probability changed for that since this episode was released? What did the space craft found out when it passed Pluto in July 2015? Somethin’ new?
Thank you for the subtitles :)
0:21 I love the little *Planet Earth is blue and there's nothing i can do.*
"You could hide a whole planet out there and it would be pretty hard to find."
Could Gallifrey be there?
Lots of discovery since this was posted, but still informative, even so!
Love this!! Thank you!
you-tube should have an option to re -edit videos with out needing to upload a new one instead, that way crach course could have updated this video with the information that we know have about pluto
Gad Yariv youtube wont release it, they used it on the UA-cam "Heros" video
I thought Pluto's moon was pronounced like 'Sharron', not 'Kayron'.
***** Apparently, both are correct, although I think that original (Greek) pronunciation is Haron (that initial h is pronounced).
hmm.. did not know that, thanks for the info.
Charon can be pronounced as SHA•ron or KHA•ron as a Greco-Roman myth person.
I knew a girl with that name. She pronounced it "Sharon."
In the Greek alphabet it looks like Xapon. English has neither the sound nor the letter X. It sounds a bit like an aspirated English H but softer, not using abdominal muscles. English orthography is an awful mess. The above X sound is often transcribed as KH. So maybe it's better spelled Kharon :)
Next ep will be meteors!! Loving this series. Space is dope.
Superb presentation
episode 25 ? shouldnt it be episode 22 ?
Yeah me three
***** Same
Thomas PlaysTheGames maybe they are reserving episode numbers for pluto close up
khhnator my exact thought
Look at the thumbnail I think it was just a typo
CrashCourse If New Horizons discoveries are significant, do you think you'll dedicate part of a future video to its findings?
Wow I only noticed the KSP figures on the bottom right 10 minutes into the video.. real observant of me. Not only am I an amateur astronomer but I'm also an avid KSP player :)
Imad Gibbs Not likely - we have a lot to cover and the series is working off of a syllabus. It's somewhat in flux, but I wouldn't get your hopes too high for such a video. HOWEVER, you can always keep an eye on Phil's Bad Astronomy blog over on Slate. I would also recommend subscribing to SciShow Space, which is produced here in the same office and will definitely be making a ton of videos as we learn things from New Horizons. :)
-Nicole
CrashCourse I didn't know about SciShow Space! Thanks for the heads up.
CrashCourse What syllabus is that? Because 22 episodes in and we're still in the solar system! What about, you know, stars? Galaxies? Red shift? Black holes? Dark matter? Quasars? Pulsars? Clusters? Nebulae? Expansion? Etc... Etc...
Imad Gibbs FWIW, it's going to take 16 months to get all of the data back. The transmission rate is sadly pretty low. The good news is that low res and compressed data will come back first and then the full, uncompressed data set will follow. IIRC, the transmission won't occur until all of the science is done so it will be a little bit before we get our first glimpse. I'm chomping at the bit as I'm sure you are.
Great analysis of an otherwise foot note in most science courses
That crying girl with the shirt that said "leave Pluto alone" was freaking hilarious! It was just like the Britney Spears girl!!! XD Haha!! Awesome video as always. ♥️
What a shirt! I want one.
Josh Bobst Wait until we get to episode 31. He's got some great shirts, but the one he brought for that shoot is my favorite so far.
-Nicole
CrashCourse Ok, I'll wait.
+CrashCourse on oort is a comets
I cannot wait for the New Horizon Pluto flyby !! its my birthday on that week too :D is anyone else checking the internet websites daily for the news of New Horizon :D
JoannaPawluk I also can't wait for it! It's going to be really exciting, we're going to see what Pluto looks like for the first time!! Ah you're so lucky that it happens on your birthday :D I do check for the news of New Horizon :D
It's my birthday that week aswell super excited
Phil Plait is an excellent host! he is one of my favorite follows on google plus
that speculative theory becoming to highly problable I love it can we get an update on planet 9 pls
Interesting you mention a planet beyond Neptune. . .
I just thought of that. "Highly speculative" in this video, and a few months later, "Moderately to Highly Probable." Science!
Tonay Planet X?
Gummy Bugz This newly predicted ninth planet bares no resemblance to the Niburu myth that has been orbiting the internet for several years now. If you add up all the supposed "facts" about Niburu, it couldn't possibly exist. It was predicted to crash into the earth in 2012 just for starters. That alone proves Niburu doesn't exist.
i know this is late and you probably wont read it, but..... if you think about it there are many planets beyond neptune. maybe even infinite planets orbiting other stars in other galaxies. since space is infinite there should also be infinite planets. technically :)
Space may be infinite, or not. But the number of bodies in it doesn't seem to be. They're just maybe uncountable, which is different.
New bodies also may be continually manufactured, but given the dissipation of energy over time, that, too, may come to an end. Especially if they're right that space will continue to expand without a predictable end.
This is not number 25, but you have it correct on the image.
In this episode Phil pronounced the name Kuiper almost correctly (as opposed to a previous episode, where he pronounced it as "Koiper"). Well done!
The mere hypothetical coincidental construction of our solar system and how all of it together might be what made life has gotten me more interested and wanting to study the thought and everything involving it
Kerbins!
PaladinV0ci isnt kerbin the planet
Alex Sitaras It is.
PaladinV0ci no it kerbals. You see jeb,bob&bill there?
"In the end. Today."
Umm, Phil. Is there something you're not telling us about later today?
Just noticed this... nice reference in the intro!
phil very nice it explained a whole lot about the kieper belt and the oort cloud.how small we are
Mr. Plait, is this the last video of crash course astronomy?
Cause I don't want it to be
Ganesh Thad Not even close! We're only about halfway there (not counting outtakes, there will be 46 in total)!
-Nicole
CrashCourse Yay!
CrashCourse That's great news. These have been some of my favorite YT videos. The series had a slow start, but has really been interesting and informative.
CrashCourse 46 woah Thanks for sharing guys it must be hyped to watch :*
CrashCourse THANK YOU!! I love you #NoHomo :v
I thought I missed 3 episodes! dammit that was close.
theJamman Sorry for the unnecessary scare! I hope we didn't send you into too great a panic.
-Nicole
Nicole, how about giving us an early bonus video on astronomy? :D
CrashCourse Asteroids next. Are you gunna release it for June 30 (asteroid day!)?
Like your work phil 👍
Great work you guys!
This is good... I think you guys must make 2-3 videos a week.. maybe... cant wait to see more... but Phil!! You're awesome!! Keep it kicking in...!
Siriusly, the sun has stolen from other stars
Alex Sitaras Ha! I get it! "Siriusly", as in the star Sirius? Because the Sun stole from other...stars...please say that pun was intentional.
***** yup
Yuusss! The oort cloud! So mysterious yet so huge! :D
I want more astronomy.Please dont let this series end.Please......
If all stars have Oort clouds, what happens to the Oort cloud when the parent star goes supernova? Do they scatter like shrapnel?
I don't understand how the Hubble telescope can see galaxies 13 billion
light years away, but we STILL don't know what's in our SOLAR SYSTEM.
Galaxies send us lots of photons. Tiny objects billions of kms away in the oort cloudcan only reflect the sun's photons, if their surface is reflective. They also shine in longer wavelenghts, but many of those waves are filtered out by our atmosphere.
I hope we'll soon have more powerful scopes in space that help us get a more complete picture of our solar system and allows us to observe it in many different wavelengths.
I hope this series is like the universe - never ending! ;)
Oh, so THAT's what Phil Plate looks like! I've heard him on SGU and a couple of other podcasts (I think). Great stuff!
I love how science still answers questions I thought all by myself as a kid:
Why Africa and South America look like they fit together?
Wait, isn't Pluto too small to be a planet? I mean, it is smaller than our moon!
Why far away objects... have this strange orbit?
Why we still didn't run out of comets?
I can't wait to see a good debate of Pluto being a dwarf-double-planet.