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Survivor of Romulus
Join Date: Jun 2012
Posts: 4,593
# 57
12-03-2012, 09:42 AM
Jumping off a cliff and space travel have a lot in common (A very high % of Astronaughts Die)

And no perpetual motion is NOT possible in space

Its not possible anywhere
the law of Entropy says that Energy is expended by movement and that it is a property of matter

Nothing is perpetual
indeed nothing moves without an energy source at some point

The chemical energy of the Sun provides most of the power in our solar system (including the solar winds) for example

But any system no matter how low in friction or gravity runs down eventually (unless there is an external energy source)

this is one major reason why interstellar travel is improbable