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On Fri, 1 Sep 2006, Michael wrote:
We use gravity to fling probes out into space. Some of it is gravity
from the sun and some is from planets. Maybe this isn't used for day to
day work but it is something humans have used.
I don't understand. How can we use gravity to fling probes into space?
I don't think you can extract energy from the gravitational field of a
planet (or moon or sun), but you can use it to reroute a craft or probe.
Maybe this is what you are thinking of:
http://en.wikipedia.org/wiki/Free_return_trajectory
Can that be used to speed up a probe or just to redirect it?
Mike
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