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plutocrass
Guest
Dear Astrophyicsist:<br /><br />Ok, so we're gonna be traveling and putting things in orbit, and/or taking resources from asteroids and building things from stuff we get in outerspace, and generally changing the mass of the earth over time.<br /><br />So what I want to know is this: <br /><font color="yellow">What is the mass of the earth, how much do we expect it to change during a "2001 Space Odyssey/Star Trek/Star Wars" time period when we have outerspace superhighways/space hotels, etc.?</font><br /><br />And for the math question: I read this article about the precision of the Moon's mass/distance with the earth, and if you changed any factor, the earth would be significantly affected such that Life itself would not appear. So I would like to ask, with respect to this line of reasoning, what if it is the earth, and not the moon which changes these factors: <br /><br /><font color="yellow">What percentage change (gain or loss) can the earth suffer before either its tilt, rotational speed, orbiting velocity, and gravitational field from the sun/moon are affected significantly?</font><br /><br />thanks, sorry if this is rambling or unclear, but i hope you math geniouses can read between the lines to understand what it is i'm asking!