
You assume that we won't be throwing bags of piss and shit away. But what about materials that aren't so readily recyclable? If launching rubbish into space was commercially viable, we'd already be doing it and reassuring the people of Earth that it'll all burn up when it hits the Sun. On the Moon, launching our detritus into space might end up being a realistic prospect.
( , Fri 3 Jul 2020, 21:56, Reply)

To reach the sun, you'd need to cancel out all of Earth's orbital speed (averaging at 29.78 km/s that's a lot of delta-v), or utilise some clever cosmic billiards to reverse slingshot your velocity down low enough to spend the last of your fuel on the last few hundred m/s needed to deorbit into the sun. Not worth it, even if you could make fusion powered ships.
You could just launch your rubbish into a nice long suborbital ballistic trajectory and let it burn up like that. An incinerator would always be safer, and I expect a lot more efficient than using a Starship as a garbage scow.
( , Fri 3 Jul 2020, 22:19, Reply)