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[misko27]

I remember having that happen when I mentioned about the theory of antigravity in year 7, and when I knew about pulsars, quasars and black holes in year 5.

That wasn't just me?

Also ignores things like the ISS and the hundreds of man-made satellites that soak up all that gravity. You should ask her if some day, we'll have so much space junk orbiting the Earth that gravity will start to fail down here.

Spoiler: The end is near (click to show/hide)

This is how 2012 goes down.

[SealyStar]

Don't hate on Luna, she was formed that way.

...

Why must I think of Lady Gaga singing about hardcore geology? D:

Children, chiiildren of the moooon... watch the wooorld go byy...

[Reelya]

All this school talk reminds me of some interesting interpretation of physics on my (geology) teacher's part.

Basically, some one asked her why Earth only has one moon. Her answer was: "Earth is so small that it cannot maintain more than one moon."

That's right kids, it's all about the law of physics called Gravity-Maintenance. Objects need actively maintain their gravity and towards each individual object at that. If they don't, things just start floating away. I guess that's one reason why humans eat; after all, maintaining our own gravity must consume a lot of energy.

God, I'm getting tired of maintaining my gravity towards this keyboard. I'll stop maintaining it for a while. Ah... that's better.

Of course this completely overlooks the well-known 2 moons of Mars.

There is some possible justification, but I'm not sure that teacher would be able to understand it. With 2 co-orbiting bodies, the equations are nice and simple classical dynamics. But when you add a third body (1 planet, 2 moons), it enters the realm of chaotic dynamics and it becomes practically impossible to predict long-term positions and velocities. It's possible that a 3 body system where all the bodies are of relatively equal size would be unstable over billion-year epochs, leading one body to be ejected via slingshot effect.

[SealyStar]

All this school talk reminds me of some interesting interpretation of physics on my (geology) teacher's part.

Basically, some one asked her why Earth only has one moon. Her answer was: "Earth is so small that it cannot maintain more than one moon."

That's right kids, it's all about the law of physics called Gravity-Maintenance. Objects need actively maintain their gravity and towards each individual object at that. If they don't, things just start floating away. I guess that's one reason why humans eat; after all, maintaining our own gravity must consume a lot of energy.

God, I'm getting tired of maintaining my gravity towards this keyboard. I'll stop maintaining it for a while. Ah... that's better.

Of course this completely overlooks the well-known 2 moons of Mars.

There is some possible justification, but I'm not sure that teacher would be able to understand it. With 2 co-orbiting bodies, the equations are nice and simple classical dynamics. But when you add a third body (1 planet, 2 moons), it enters the realm of chaotic dynamics and it becomes practically impossible to predict long-term positions and velocities. It's possible that a 3 body system where all the bodies are of relatively equal size would be unstable over billion-year epochs, leading one body to be ejected via slingshot effect.

Obviously Mars just has much smaller moons. That's why it can hold two, since larger moons need more maintenance.

[Reelya]

3 body problem, multiple large moons are likely to be unstable configurations.

Of course, it's nothing to do with the number of moons per se, but the instability of triple body systems unless the extra bodies are minute.

[SealyStar]

3 body problem, multiple large moons are likely to be unstable configurations.

Of course, it's nothing to do with the number of moons per se, but the instability of triple body systems unless the extra bodies are minute.

But quadruple bodies restabilize. It's only triple.

[Pnx]

We did once have two moons, but they sort of collided into each other.

[Darvi]

I  thought the other went on to become an independent planet?

[da_nang]

Hush! Don't tell people that. You know what Nazis do to snitches.

[Darvi]

No I don't, he kept refusing to tell.

[SealyStar]

I thought pnx was a cat lover?

hans in the nazi, I'm a fapping penguin, darvi is some person off some... thing, and you are what looks like a precursor to an argonian.

QED, the only way to do that would be to get hans, and he's on probation.

I'm an angry seal.

[Descan]

* Descan hugs sealy and gives him fishies~!

[RedKing]

And Descan is a FABULOUS chibi Viking.

[Descan]

And Descan is a FABULOUS chibi Viking.

FTFY

[miauw62]

What about me?