Also, I say we adopt the phrase "I had a Mercury's day" to describe a day when it feels as if everything was chaotic and the end of your day never seemed to arrive.
It took me a while to understand from 5:08 to 5:30. I'll break it up for the one's who are facing the same problem as I did. 1) At Aphelion, Mercury's angular rotational speed is faster than it's angular orbital speed, so the Sun moves rapidly to the west side in the sky. 2) Four days before Perihelion, the angular orbital velocity of Mercury is equal to the angular rotational velocity, so the Sun appears to stop in the sky. 3) While now at Perihelion, the angular orbital velocity of Mercury is more than the angular rotational velocity, so the Sun appears to move eastwards. 4) Now as the Mercury is pulled away from the Sun i.e. it leaves it Perihelion position, again it moves westwards as the angular rotational velocity dominates over the angular orbital velocity.
Thanks, that clears it up a bit...can you explain what angular rotational speed, angular orbital speed, and angular rotational velocity are? That would be great, thanks!
@@amritha.yelleti put very simply, when mercury is farthest away from the sun, it's spinning faster than it orbits, so the sun appears to move fast across the sky. When it's closest to the sun, it's actually orbiting faster than it spins for a little bit, making the sun appear to move backwards to the east. As the orbit moves further away from the sun, the orbit speed slows, causing the sun to appear to move west again.
This video actually corrected a misconception that I had about Mercury. I remember reading that Mercury was tidally locked in the same way that the Moon was so that its year was the same as its day. I always believed that Mercury had a permanent light side and dark side, and that the light side was always really hot and the dark side was extremely cold. I think I got this impression from a children's book I had while growing up which might have been using out of date information.
The best thing about Thursday is more Crash Course Astronomy, where I get to learn some stuff I didn't know, get reminded of some stuff I did know, and I get to hear Phil's one-liners, which are awful in all the right ways.
All the craters are named with surnames, not first names. Unfortunately, there is no "Mercury" crater, considering there _is_ a "Lennon" crater, named after John Lennon, so it's not just classical musicians. But I suppose it would be awkward having a crater Mercury on Mercury. They could still name one "Bulsara" since that was his real name, but no one knows him by that name.
sheepwshotguns Right? I was waiting for CC Astronomy to get to the good stuff, because I really like the host. He's not quite as entertaining as John, but compared to the CC Politics guy...
Little bonus fact, even though it is the closest planet to the sun, Venus is hotter, this is because the atmosphere on Venus keeps the heat in. Because Mercury has almost no atmosphere to retain heat, Mercury's surface experiences the greatest temperature variation of the planets in the Solar System, ranging from 100 K (−173 °C; −280 °F) at night to 700 K (427 °C; 800 °F) during the day at some equatorial regions.
I get so excited every time an Astronomy crash course shows up on my subscription list, seriously how come we never learn any of this fascinating stuff in school?
Mr plait, thank you for taking time in your life to teach us about this ever expanding universe and the celestial bodies that move in it. I look forward to watch your videos to escape my depressing days
thank you for quick speaking style. easier to get information that way. but you emphasized important parts clearly. thank you also for using kilometers. class course!
Yes, we're getting somewhere! In the first episodes of Astronomy CC, nothing was said that I haven't known since I was 8 y.o. But here I learned several new things!
This video told me a lot about Mercury that I didn't know, but it didn't answer the question I had - about the anomaly of Mercury's orbit that had to be explained through Relativity. I have looked in other places, where the anomaly seems to be its precession - but I don't think relativity is needed to explain that. I'm guessing that when precession is taken into account, the orbit is still not exactly what it is expected to be. The answer must be out there somewhere - but the Internet is a big place!
Oooh, we're on planets now! Nice :) I'm using this mostly as interesting revision of basic concepts for my Astrophysics course, and it hasn't failed to deliver so far (you even mentioned the sodium tail, and magnetosphere!)
Thank you very much for making this video, Phil Plait, _Though Café_ and the rest of _CrashCourse_ Astronomy! It was fascinating to learn about Mercury, surely one of the weirdest planets in our solar system. I have a question for you: you said that Mercury stated out as a very big planet and than got small do to a collision with something. A few episodes back, you talked about the moon and how it was formed by a collision between Earth and the planet Theia. Is it possible that Mercury was Theia all along? Is the Moon a child of Earth and Mercury? What do the space geologists say?
«In 1639, the Italian astronomer Giovanni Zupi discovered that it undergoes a complete cycle of phases, just like the Moon does. The only way that can happen is if Mercury orbits the Sun and not the Earth....» But Phil, the Moon undergoes a complete cycle of phases - which is why you use it for comparison - but it orbits the Earth, and not the Sun.... Henri
Seems sriontube isn't counting the Asteroid Belt, Ceres, the Galilean Moons or Saturn's moons/rings as potential episodes in his equation (though, it's possible he counted one of them... or accidentally counted Earth.) One could also fill out an entire episode about the discoveries of Uranus, Neptune and Pluto before making episodes about the planets themselves.
Mercury has a comet like tail, water ice in craters, measurable magnetic field? and it's weird tidal locking pattern with Sun... wow.. the solar system never ceases to amaze me.
There's also the thing about how Mercury helped to prove General Relativity. IIRC the precession of Mercury's perihelion was slightly different to the value predicted by Newtonian orbital dynamics, and that turned out to be because it's deep enough in the Sun's gravity well for relativistic effects to be measurable. But I don't really know the details - so I'd love to see Phil (or possibly SciShow Space) cover this at some point!
PajamaMan According to the "Kurzgesagt" video on the moon Triton (great channel btw) there are 4 tectonic active objects in the solar system. Earth, Triton, Io and Enceladus. Though there is still a lot of speculation involved.
Also, I say we adopt the phrase "I had a Mercury's day" to describe a day when it feels as if everything was chaotic and the end of your day never seemed to arrive.
It took me a while to understand from 5:08 to 5:30. I'll break it up for the one's who are facing the same problem as I did.
1) At Aphelion, Mercury's angular rotational speed is faster than it's angular orbital speed, so the Sun moves rapidly to the west side in the sky.
2) Four days before Perihelion, the angular orbital velocity of Mercury is equal to the angular rotational velocity, so the Sun appears to stop in the sky.
3) While now at Perihelion, the angular orbital velocity of Mercury is more than the angular rotational velocity, so the Sun appears to move eastwards.
4) Now as the Mercury is pulled away from the Sun i.e. it leaves it Perihelion position, again it moves westwards as the angular rotational velocity dominates over the angular orbital velocity.
Thanks, that clears it up a bit...can you explain what angular rotational speed, angular orbital speed, and angular rotational velocity are? That would be great, thanks!
@@amritha.yelleti put very simply, when mercury is farthest away from the sun, it's spinning faster than it orbits, so the sun appears to move fast across the sky.
When it's closest to the sun, it's actually orbiting faster than it spins for a little bit, making the sun appear to move backwards to the east. As the orbit moves further away from the sun, the orbit speed slows, causing the sun to appear to move west again.
i dont get how a day equals two years.I couldn't relate the motion of mercury around sun and its day duration.Could you please explain?
This video actually corrected a misconception that I had about Mercury. I remember reading that Mercury was tidally locked in the same way that the Moon was so that its year was the same as its day. I always believed that Mercury had a permanent light side and dark side, and that the light side was always really hot and the dark side was extremely cold. I think I got this impression from a children's book I had while growing up which might have been using out of date information.
Phlebas same here!
I LOVE listening to this guy! Something aabout the way he talks just makes me want to listen.
not a 2am!
I feel like I just had 2 cups of coffee and did a line of coke!
brother?
The best thing about Thursday is more Crash Course Astronomy, where I get to learn some stuff I didn't know, get reminded of some stuff I did know, and I get to hear Phil's one-liners, which are awful in all the right ways.
lol I love the fssst sound he made when he talks about the water
KL Havoc/Pyrex92 Everybody knows that's the sound of evaporation!
KL Havoc/Pyrex92 The sizzle sound effect.
KL Havoc/Pyrex92 I read this comment the moment I heard him make the sound :D
KL Havoc/Pyrex92 you can buy the sound effect on amazon i think
I like the fact that came along with it aswell
Being both really hot and really cold, Mercury must be really having some *first world problems*
Nice XD
These videos always provide some interesting facts.
Mark B well, they're spozed to! ;-)
"of course in the harsh heat, that water just goes fsstttttt" LOL
made my day
I love this guy, he seems to be so interested and passionate about what he's talking about. Always makes for an interesting video.
can we appreciate the fact that Phil broke out of prison just to deliver us this episode?
There'd better be a crater named after Freddie in that planet
lmAO RIGHT Because his last name is Mercury, that's perfect!
All the craters are named with surnames, not first names. Unfortunately, there is no "Mercury" crater, considering there _is_ a "Lennon" crater, named after John Lennon, so it's not just classical musicians. But I suppose it would be awkward having a crater Mercury on Mercury. They could still name one "Bulsara" since that was his real name, but no one knows him by that name.
@@pasijutaulietuviuesas9174 is that a 'fun' fact?
@@unclefreddieDied No, I'm explaining why there could not be a crater "Freddie".
Haha!!
Love how he does the lesson recap at the end to focus on the key points in the lesson. AMAAZIIIINGGG
oh this is fantastic. we're really starting to get some meat and potatoes with this crash course.
sheepwshotguns Right? I was waiting for CC Astronomy to get to the good stuff, because I really like the host. He's not quite as entertaining as John, but compared to the CC Politics guy...
Diana Peña Shut up and eat your chicken.
Planets and Suns and potential life on other planets is amazing!
The moon is boring as sht.
sheepwshotguns Why did you have to talk about meat and potatoes, now I'm hungry. Apart from that I agree.
sheepwshotguns exactly what I thought, first few episode disapointed me a little but this one was great!
Hi Mr phil thaks for your videos
Hello Qscience you're welcome. :)
Little bonus fact, even though it is the closest planet to the sun, Venus is hotter, this is because the atmosphere on Venus keeps the heat in.
Because Mercury has almost no atmosphere to retain heat, Mercury's surface experiences the greatest temperature variation of the planets in the Solar System, ranging from 100 K (−173 °C; −280 °F) at night to 700 K (427 °C; 800 °F) during the day at some equatorial regions.
***** numbers lol nerd
***** thanks dude! interesting stuff :)
***** Hey you're spoiling the next CC astronomy!
***** obviously this also explains the whole ice thing :D
do you people really not know that...? Have you people never taken a class on science?
Took me a little while but I was absolutely stoked to notice Jeb, Bill and Bob on the shelf in the background.
I love this series, and I loved the fact about craters being named after artists.
I get so excited every time an Astronomy crash course shows up on my subscription list, seriously how come we never learn any of this fascinating stuff in school?
I love the fact you have your own book on the top of the stack of books in front of you Phill
Crash Course Astronomy has become my favorite show on your channel. Thank you guys.
Phil, even when making bad puns, you're so classy, just keep up the great work :D
Mr plait, thank you for taking time in your life to teach us about this ever expanding universe and the celestial bodies that move in it. I look forward to watch your videos to escape my depressing days
I become so overwhelmed with excitement when I see a new Crash Course Astronomy episode!
I think I like this episode best so far. This is the first one to really surprise me with new and very interesting information. :)
Wonderful, wonderful episode. I learned more new stuff in this one than in possibly the whole series leading up to it. Can't wait to see more.
Having the Kerbal figurines in the background is a nice touch.
I friggin' love this Crash Course series. Phil's the man.
Your videos contain much more information than i expected from a "crashcourse". Cool!
LOVE the sound effect of water going FSHZZZ on the surface at 9:10
Solid Ice On Mercury, a planet like Mercury. This Facts gives me Goose Bumps. Biggest Surprise Of My Astronomy Learning Career...
Huhhhh, That is really really bizarre...
"Solid Ice On Mercury, a planet like Mercury. " What?
Love this show!
Loving this channel.
U speak very nicely clearly n a little bit slowly which makes us understand easily.. Thanks!! :)
Ahh loved this episode! Can't wait for the next :)
I love all your videos so much.. Amazing information educational and fun to study.. Thank you for everything 🙏
I loved this one! I learned so much about how they make discoveries about bodies in the solar system. I've always wondered. Thanks!
thank you for quick speaking style. easier to get information that way. but you emphasized important parts clearly. thank you also for using kilometers. class course!
Yes, we're getting somewhere! In the first episodes of Astronomy CC, nothing was said that I haven't known since I was 8 y.o. But here I learned several new things!
CrashCourse I had no idea that some craters had a lot of water in them.
Thanks for the Upload CC :)
thoroughly enjoy watching these videos after a long day ... thanks guys! keep it up :)
Before watching this video, I didn't care about Mercury.
Now I love it ! Thanks Phil. :)
I freaking love this series so much!! That's all.
This video told me a lot about Mercury that I didn't know, but it didn't answer the question I had - about the anomaly of Mercury's orbit that had to be explained through Relativity. I have looked in other places, where the anomaly seems to be its precession - but I don't think relativity is needed to explain that. I'm guessing that when precession is taken into account, the orbit is still not exactly what it is expected to be. The answer must be out there somewhere - but the Internet is a big place!
This show is so interesting. Definitely the highlight of my Thursdays.
Oooh, we're on planets now! Nice :)
I'm using this mostly as interesting revision of basic concepts for my Astrophysics course, and it hasn't failed to deliver so far (you even mentioned the sodium tail, and magnetosphere!)
I love how there's 3,185 thumbs up and 10 thumbs down. That, my friends, is the ratio of a master youtuber. :)
I love this series please keep the videos coming!
Excellent crash course. Thx for sharing
Great watch
Fantastic series Phil.!!!
Another fantastic video. Thank you guys so much.
I didn't know about the relationship between Mercury's days and years - that's so interesting! Thanks for the great video!
Thank you very much for making this video, Phil Plait, _Though Café_ and the rest of _CrashCourse_ Astronomy! It was fascinating to learn about Mercury, surely one of the weirdest planets in our solar system.
I have a question for you: you said that Mercury stated out as a very big planet and than got small do to a collision with something. A few episodes back, you talked about the moon and how it was formed by a collision between Earth and the planet Theia. Is it possible that Mercury was Theia all along? Is the Moon a child of Earth and Mercury? What do the space geologists say?
wait until you learned about Venus
Nope
«In 1639, the Italian astronomer Giovanni Zupi discovered that it undergoes a complete cycle of phases, just like the Moon does. The only way that can happen is if Mercury orbits the Sun and not the Earth....» But Phil, the Moon undergoes a complete cycle of phases - which is why you use it for comparison - but it orbits the Earth, and not the Sun....
Henri
the intro killed me xD
"One thing we've learned about nature, that it has a lot of imaginations than we do"- brilliant quote. Should go into books of philosophy
I clicked on this by accident but couldn't click away as the none stop facts drew me in. Nicely done guys
i know what are the next 8 episodes of Crash Course Astronomy...so do you.
sriontube I see you putting that thinking cap on... but we might pull a bit of a plot twist on you, so stay tuned, friend. ;)
-Nicole
Seems sriontube isn't counting the Asteroid Belt, Ceres, the Galilean Moons or Saturn's moons/rings as potential episodes in his equation (though, it's possible he counted one of them... or accidentally counted Earth.) One could also fill out an entire episode about the discoveries of Uranus, Neptune and Pluto before making episodes about the planets themselves.
i can't wait for saturn, favorite not Earth planet
Recon WB Neptune's winds will literally blow the Saturn episode away
with saturn's mass, maybe in a few billion years ;)
What a great description of the Sun's path in Mercury's sky!
I love these videos, never stop!
WOW! Never thought Mercury could have ice... LOL! Thanks for that, Phil and PBS!
Remember to watch this year's Mercury transit 9th May 2016.
Note: don't do it without proper eye protection.
teubert2 I just covered my hands with my eyes..........wait
lolol
Great episode, thanks for doing what you do!
man this vids are awesome
Thank you so much for these super interesting videos!!!
So excited to see this
Mercury has a comet like tail, water ice in craters, measurable magnetic field? and it's weird tidal locking pattern with Sun... wow.. the solar system never ceases to amaze me.
How am I always here so early????
Anywho
crash course philosophy
Salomon Flamenco yess^^^
Salomon Flamenco Yes please.
You say this on every crash course video shut up
Crash course physics
Salomon Flamenco nice
I can't believe how much time did i waste without knowing about you guys
You are amazing
loving this series :D and i must say Phil is such a great host ! :D
I seriously hope that astronomers DO NOT name a newly discovered crater on mercury Beiber.
I feel you...!
I don't know why they would, since they only name craters after artists
princess of spades
It makes me sad that when you think of an artist you think of Bieber.
Same as you
loved it phil! nice job
I love how each planet has its own special characteristics that give them their unique "personality" :-)
rewatching my fav episodes. i miss this series so much :'(
Phil is such a great host!
Great episode
Very good sir. The solar system is so interesting.
The Kerbals on the shelf are a nice touch.
So freaking amazing! It's wonderful how astronomy can surprise us. :D
l love the way this guy explains things,make it more interesting
I really enjoyed this video!
I love you, Phil.
Excellent info.. THANKS!!!
Get you a man that talks about you as excited as this guy talks about mercury
Thanks for the video ☺ I love crash course
the beat at the end and beginning is dope if you have headphones with a lot of bass.
also. I never comment but I want to say that I love your videos and listen to them often.
Mr Phil, you are a really good host!
There's also the thing about how Mercury helped to prove General Relativity. IIRC the precession of Mercury's perihelion was slightly different to the value predicted by Newtonian orbital dynamics, and that turned out to be because it's deep enough in the Sun's gravity well for relativistic effects to be measurable. But I don't really know the details - so I'd love to see Phil (or possibly SciShow Space) cover this at some point!
One of the best channels (one...)
The strange planet is mercury 🖤 I love you Mercury , and I can feel your weirdness
Thank you so much for this video, it so interesting .
best show on youtube
Great video! Never thought there was water, let alone in the form of ice, on Mercury.
Awesome video!
Do any other planets have tectonic plates?
PajamaMan You better watch out kid
PajamaMan Venus might. Mars & Mercury not. Of course, the gas giants don't have a crust.
I'm willing to be a few geologically active moons do, as well. Not ours, of course, but the gas giants.'
PajamaMan Mainly moons
PajamaMan According to the "Kurzgesagt" video on the moon Triton (great channel btw) there are 4 tectonic active objects in the solar system. Earth, Triton, Io and Enceladus. Though there is still a lot of speculation involved.
I love this man!
love this series :)
I loved this video, thank you