general/spaceflight-concepts

Theoretical description of Earth's gravimetric shape

Spacecraft trajectory that encounters Earth and Mars regularly

Type of spacecraft

Type of theoretical spacecraft

Test in spaceflight

Proposed method of Moon landing

Type of orbit which passes close to the Earth and Moon

Time period during which a rocket must launch to reach its target

Spaceflight where the spacecraft does not go into orbit

Self-filling orbital rocket fuel depot

Uncrewed spacecraft mode

Spacecraft orientation

Spaceflight where spacecraft orbits an astronomical body

Space travel concept

Removal of internal energy in a spaceship at end of its mission

Orbital data format

Method of landing a spacecraft by parachute in a body of water

Spaceflight maneuver

Earliest phase of a flight that reaches space

Cache of propellant used to refuel spacecraft

Spacecraft-local time for events that happen at the spacecraft