I know it is a funny thought but I am curious. For instance, the mega-quakes can speed up or slow down self-rotation of Earth, albeit minutely. So in a similar vein would it be possible for a group of wacko scientists to get Earth off its orbit around the Sun to freezing cold in outer space by means of technology and materials? Can this idea be proved to be possible or not? Or maybe it was discussed earlier somewhere on Intertubes and you can help me find it.
What would happen to the earth's rotation, orbit, etc. if the planet were half as large, diameter-wise, as it is now? [more inside]
Could mining the moon destroy the oceans? [more inside]
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?
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? [more inside]
Help me understand the phases of the moon. Why is it that a New Moon is visible at all? [more inside]
How much information is needed to calculate the orbit of, say, an asteroid or a comet? Is it a simple, automated process? [more inside]
Is there a distance at which a satellite will orbit a body indefinitely? Is this distance a universal constant? [more inside]
Would orbiting solar power farms be remotely practical? [more inside]
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?
AstroPhysics: Why doesn't the moon move towards the earth, and other satellite related questions. [more inside]
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? [more inside]
What is the origin of the phrase, "(something) should be nuked from orbit," or "nuke it from orbit?" [more inside]