3 ms·
The net energy cost of ballistic travel in vacuum can be arbitrarily low. The post talks about rockets, but that's not the only way.
by abecedarius 5y ago
The net energy cost of ballistic travel in vacuum can be arbitrarily low. The post talks about rockets, but that's not the only way.
- keyle 5y agoI don't know much about this but I'd be keen to hear what alternatives to rockets there would be on the moon to get off the rock? Are you implying one-off ballistic shots?
- abecedarius 5y agoThrowing and catching are reversible operations, like a regenerative brake in an electric car. Even if your tech is too crude for a regenerative catcher, at the throwing end you could still finesse the rocket equation with a https://en.wikipedia.org/wiki/Mass_driver https://en.wikipedia.org/wiki/Mass_driver See also https://en.wikipedia.org/wiki/Skyhook_(structure) https://en.wikipedia.org/wiki/Skyhook_(structure)