What would happen to the earth's rotation, orbit, etc. if the planet were half as large, diameter-wise, as it is now?
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posted by drlith
on May 23, 2012 -
11 answers
Is it possible for a moon to have an orbit such that it is only ever visible from its planet during daylight hours? If so, what are the necessary requirements for this to happen?
posted by curious nu
on Aug 20, 2011 -
14 answers
Martian Astronomer Filter--when Mars moves like
this in the sky from our point of view on Earth, how does the Earth appear to move from Mars' perspective?
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posted by JMB1138
on Feb 24, 2011 -
3 answers
Help me understand the phases of the moon. Why is it that a New Moon is visible at all?
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posted by doubtless
on May 22, 2010 -
16 answers
How much information is needed to calculate the orbit of, say, an asteroid or a comet? Is it a simple, automated process?
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posted by Jimbob
on May 3, 2010 -
13 answers
Is there a distance at which a satellite will orbit a body indefinitely? Is this distance a universal constant?
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posted by doublehappy
on Oct 16, 2009 -
28 answers
I vaguely recall seeing some kind of online/download that tracked in near realtime all of the satellites orbiting earth, allowing the user to pan around. Am I insane, or does that exist?
posted by sharksandwich
on Aug 3, 2008 -
7 answers
AstroPhysics: Why doesn't the moon move towards the earth, and other satellite related questions.
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posted by dpx.mfx
on Aug 21, 2006 -
22 answers
Hypothetical from Moon-orbit to Earth-orbit question. I already know about free return trajectories, but what if something went wrong and your ship (currently orbiting the moon) didn't leave lunar orbit at the point it was supposed to? What might happen?
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posted by np312
on Aug 17, 2006 -
8 answers
What is the origin of the phrase, "(something) should be nuked from orbit," or "nuke it from orbit?"
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posted by mikeh
on Jul 23, 2006 -
24 answers
