astr - axia
- astral
- astroarchaeology
- astrobiology
- astrocompass
- astrodynamics
- astrogeodetic geoid
- astrogram
- astrograph
- astrographic camera
- astrographic objective
- astrographic plate
- astrographic telescope
- astrography
- astrolabe
- astrometric binaries
- astrometric orbit
- astrometric satellite
- astrometric telescope
- astrometrical instrument
- astrometrical instruments
- astrometry
- Astron
- astronaut
- astronautics
- astronavigation
- astronegative
- astronomer
- astronomical aberration
- astronomical azimuth
- astronomical body
- astronomical calendar
- astronomical camera
- astronomical climate
- astronomical clock
- astronomical colorimetry
- astronomical constant
- astronomical coordinate system
- astronomical coordinates
- astronomical data
- astronomical expedition
