perigee (n.)
- abutment
- adjacency
- aphelion
- apogee
- apposition
- burn
- capsule
- circle
- conjugation
- conjunction
- connection
- contiguity
- docking
- ecliptic
- equator
- equinoctial
- equinox
- injection
- insertion
- junction
- juxtaposition
- longitude
- meridian
- module
- orbit
- perihelion
- period
- reentry
- rocket
- spacecraft
- spaceship
- syzygy
- trajectory
- union
- zodiac
- zone