Jupiter's Moons: Crash Course Astronomy #17

Before moving on from Jupiter to Saturn, we’re going to linger for a moment on Jupiter’s moons. There are 67 known moons, 4 of which are the huge ones that we want to explore in greater detail. Ganymede is the largest - larger, in fact, than any other moon in the solar system and the planet Mercury! Callisto, orbiting the farthest out, is smaller but quite similar to Ganymede in many ways. Io, meanwhile, is most noteworthy for its tremendous volcanic activity. There’s also water on Ganymede and Europa!

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Chapters:
Introduction: Jupiter's Moons 00:00
Ganymede: Jupiter's Largest Moon 1:15
Callisto: Jupiter's Second Largest Moon 2:15
Io: Volcanoes! 2:59
Europa: The Ocean Moon 4:48
The Habitable Zone 7:05
Jupiter's Other Moons 7:49
Review 9:33
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PHOTO/VIDEO SOURCES

[davidshafer]

Jupiter is considered by some to be a system in it's own right, and as you said in a previous episode it emits heat. When you combine that with the friction from tidal forces on Europa by the other moons, it wouldn't too much of a stretch to say that the Jupiter System has it's own habitable zone.

[Tesserex]

Fun fact: Io, Europa, and Ganymede are in 1:2:4 orbital resonance. Meaning for every time Ganymede orbits, Europa orbits twice, and Io orbits 4 times. But their pattern is such that there's never a triple conjunction (they never all line up on the same side of Jupiter, instead there can only be two of them at conjunction and the other at opposition).

[jeroenjager]

"But that was no moon" I thought we discovered the death star for a second.

[joshbobst]

I think we should call moons that are too small to be round, like small asteroids, asteroons.

[monev]

I'm looking forward to more astronomy videos. A LOT MORE! A LOT!

[Grillpander]

Living in Germany, I can assure you: There is life in Europa.




Thank you, I'm here all week.

[liampgc]

If there's life on Europa, does that make them Europeans?

[MrBloodySpirit]

There is A LOT to talk about when it comes to space. This could have so many episodes. Keep it up, it's awesome.

[effiedeia]

Ganymede is one of my favourite astral bodies. I love the little unique story behind Ganymede as a mythological character too. The aurora light effects on the poles are gorgeous.

Europa is extremely interesting with its layers of ice and water and I can't wait for more information on that moon. The movie Europa was really interesting.

Thanks for making these videos!

[Eternal_Tinsel]

To all space programs, one of you better get to Europa before I die so I can know whether or not there is alien life. Please and thank you!

[sheepwshotguns]

we better make it under the surface of europa in my lifetime with a live stream camera or im going to be pissed!

[MettheSlayer]

Goddam, didn´t know that our own solar system was that cool.

[McNarly]

This episode, particularly the section about Europa is the reason I tune in to this show. I've been so curious about Planets (or in this case Moons) we believe have the conditions for living organisms. I don't remember ever being this interested in learning when I was in school. Loving this series so far, thanks for keeping it interesting!!!

[skynet]

Europa: NASA, come over!
NASA: can't.... just too far away!
Europa: I'm wet.
NASA: I am coming...!

[bjornhommel]

Phil, Crash Course Astronomy is amazing. Your depths of knowledge and your didactic skills make this show so much fun to watch. Please keep it up, love it!

[potawatomi]

Phil, you produce some of the best programming on YouTube and television for that matter. Outstanding information and excellently narrated. Thank you.

[maiaraloureiro]

Crash Course Astronomy is one of the best things ever in the history of humankind.
Congratulations

[TJ-vsxi]

I just wanted to say this is my favorite show on YouTube and you guys have a good thing going here. I love you guys!!!!

[robert_wigh]

Thank you very much for making this video. Phil Plait and the others at _CrashCourse_ Astronomy! It was really interesting to learn about the moons of Jupiter. Jupiter - the gorilla in the Solar system, the giant that is really hostile to live but has moons that are promising in the search for life on other worlds. Go Europa! I can’t wait for next episode, where we will learn about Titan and Enceladus!

By the way, I live in Europe and this also seams life can exist here to. ☺

[Max]

There are only a few youtube channels that i regularly check for updates, and this astronomy course is one of them. I absolutely love these videos!