4 ms·
The escape velocity for Earth is 11 km/s. The escape velocity for mars is 5 km/s. The situation for a ground launched projectile is of course worse because of
by colechristensen 3y ago
The escape velocity for Earth is 11 km/s. The escape velocity for mars is 5 km/s. The situation for a ground launched projectile is of course worse because of air resistance losses.
It's still really difficult to accelerate something to 5 km/s. (It's 2.5 km/s on the moon)
- rtpg 3y agoWikipedia says there are prototype railguns that can shoot at 3km/s now (wording: "can regulary exceed 3km/s")... are we at a point now where I could put a rail gun and a bunch of solar panels and batteries on the moon and just shoot (tiny) stuff into orbit? Not like the rocks on the moon are that useful for anything, but....
- Fred34 3y agoApparently there is helium-3 on the moon which could be used as a fusion reactor fuel. https://en.m.wikipedia.org/wiki/Helium-3 https://en.m.wikipedia.org/wiki/Helium-3