Orbits and mechanics
大气阻力
Atmospheric drag
Thin air slowing a satellite down.
At 400 km a satellite loses a few km of altitude a year.
Related terms
- Escape velocity — The minimum speed needed to leave a body's gravity.
- Atmospheric reentry — A spacecraft coming back into the atmosphere.
- Hohmann transfer — A two-burn manoeuvre that moves between circular orbits on minimum fuel.
- Orbital plane — The plane an orbit lies in, tilted by its inclination.