Astronomy Lecture - the Planets

Astronomy Lecture - the Planets

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• astronomy
• lecture

[dman68854]

Why does the water freeze on Mars when he said it would evaporate due to the very small atmosphere?

[doctordave]

@dman68854 Maybe that wasn't clear - I think what I meant to say was that EVEN IF Mars was say 50ºF, the water would quickly evaporate b/c of the very low atmospheric pressure.

[DrMadolite]

Don't forget our other dwarf planets either, if you're including Pluto - Ceres, Haumea, Makemake and Eris (not to mention Orcus, Quauar, etc).

Nice video though, and my comment isn't too relevant, I'm just saying :)

[doctordave]

@DrMadolite I think I talk about all the dwarfs/TNOs in a later lecture... the one where I do asteroids, comets, and the Kupier belt!

[doctordave]

@wavepsychic The small tilts of the Sun and planets' rotational axes relative to the average plane of the SS by no means "disprove" the theories of SS formation. Do you really think you are the first person to have noticed this? Do you really think there aren't astrophysicists who spend their whole careers working on the dynamics of the SS who probably understand the details of the physics involved a little bit better than you do based on the handful of internet videos you've watched?

[doctordave]

@Topmostpop Wow. Just... wow. Angels huh? Are you posting this mesasge from the 13th century??

[jimmy69691000]

Uranus hahaha

[rubyilg]

Billy Meier - Regarding Nibiru And Other Planets In Our Solar System 

[tomwduda]

@tomwduda correction: "...does have a liquid core" should be "... does NOT have a liquid core." My thanks to sharp-eyed DrMadolite for catching my goof. Peer-reviewed comments. Who woulda thunk?  :-D

[DrMadolite]

@tomwduda "does nave" = "doesn't have" I assume. Ok nvm then, thought you were being sarcastic. But yeah, these contradictions are interesting, they make us rethink how the universe works. For instance, I read somewhere that the Canis Majoris star defies all natural laws, it's simply too large t be a star. And yet it is.

[tomwduda]

@DrMadolite My point is that he was describing interesting items about each planet. To have a magnetic field, a planet should have a liquid core. Mercury has a magnetic field but does nave a liquid core.I think that's an interesting item.

[DrMadolite]

@tomwduda What's your point? He included Pluto in "The Planets" of our solar system. That's factually wrong, because Pluto is not a planet, it's a dwarf planet. If he's gonna talk about just the main planets, then there's 8. If he's gonna talk about ALL planets, then there's 8 + 12 or so.

It's not a big deal, but he's being factually wrong. Wouldn't you question someone who told us that the world was flat? Besides, he replied to my comment so it's case closed.

[tomwduda]

@DrMadolite Dear me. He didn't mention Mercury's magnetic field. Could that be an Inconvenient Truth?

[DrMadolite]

@doctordave Cool. Well, thanks for the video though, great information. :) Only beef is that it seemed to stop at the middle of Saturn and I didn't see any link to any "part 2".