Word | Noun | Adjective | Verb | Adverb |
---|---|---|---|---|
gravity-assist | Yes | No | No | No |
space travel | Yes | No | No | No |
gravity-assist (noun) | space travel (noun) |
---|---|
(spaceflight) a trajectory that passes close to a planetary body in order to gain energy from its gravitational field | a voyage outside the Earth's atmosphere |