[ExI] China to Own the Moon by 2027

Anders Sandberg anders at aleph.se
Wed Apr 4 12:46:30 UTC 2012

On 2012-04-04 08:29, Eugen Leitl wrote:
> If you have launching facilities you can retaliate by a hail of
> tungsten at high Mach.

Note that retaliation ground-orbit and ground-ground is actually easier 
than orbit-ground, since you need to provide enough delta-v to make an 
Earth-intersecting orbit (and in orbit you will tend to be reaction-mass 
poor). You don't drop things from orbit, you have to throw them very hard.

> And since having the Moon means having access to the entire
> Solar system you could go out, and divert something bigger.
> Like few km boulders, precision-guided, or even a 10 or 100 km
> object.

Big boulders are hard to accelerate, so you will throw them at normal 
orbital speeds closely along their natural orbits. This means they will 
take years to arrive.

Anders Sandberg
Future of Humanity Institute
Oxford University

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