| ▲ | Perz1val an hour ago | |
No, jet engines push against the atmosphere and the atmosphere is a part of the earth | ||
| ▲ | delichon 33 minutes ago | parent [-] | |
https://physics.stackexchange.com/questions/608372/if-a-jet-... It would have to be rockets. My napkin says 2B starship boosters and 250K tons of propellant per second should give us around 1 second per year. | ||