Re: How on earth are we going to comlete the space elevator
- From: Pascal Bourguignon <pjb@xxxxxxxxxxxxxxxxx>
- Date: Sat, 22 Apr 2006 15:08:19 +0200
"Mj" <milanjotassi@xxxxxxxxx> writes:
this is a simple reason why the space elevator will not work. there is
too much reletive movement between the earth and the orbit for such a
task to take place. if someone has an explanation please explain
This depends on the orbit.
On an orbit in the plane of the equator at about 42000 km from the
center of the Earth, there's no relative movement.
That's why you can point a fixed parabole at these geostationary TV
satelites, and watch TV for more than a few seconds without having to
track them.
So we just have to put a big cable in geostationary orbit, and unroll
it down, while unrolling up a counterweight to keep it in
geostationary orbit. Since the cable doesn't move relative to the
Earth below the geostationary orbit, the gravity is stronger than the
centripetal force, so it's attracted vertically by Earth gravity.
Since the counterweight doesn't move relative to the Earth above the
geostationary orbit, the gravity is weaker than the centripetal force,
so it's pulled out vertically.
http://scienceworld.wolfram.com/physics/CentralOrbit.html
--
__Pascal Bourguignon__ http://www.informatimago.com/
READ THIS BEFORE OPENING PACKAGE: According to certain suggested
versions of the Grand Unified Theory, the primary particles
constituting this product may decay to nothingness within the next
four hundred million years.
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