A Remarkable New Thruster Could Achieve Escape Velocity—and Interplanetary Travel
But to travel from low-Earth orbit (LEO) to farther orbits—or even the Moon—requires a different kind of ion thruster capable ...
Phys.org11 个月
Some intelligent civilizations could be trapped on their worlds
A new article in the Journal of the British Interplanetary Society examines ... Earth's escape velocity is 11.2 km/s (kilometers per second), which is more than 40,000 km/h. The escape velocity ...