Why was it thought that there were other planentary systems in the universe before technology was developed?
August 29, 2009 by Question
Filed under Tech Answers
to allow searches for them. explain
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i think Mercury is the only planet that does not have a moon.
it seems to be that any sufficiently large body will have something going around it.
if i recall correctly, even one of the asteroids has a satellite.
what would be unusual, to say the least, would be to assume, or find, that other stars didn’t have planets.