- aberration of starlight
- alt-azimuth
- aperture
- aphelion
- apogee
- armillary sphere
- asteroid
- Asteroid Belt
- axial tilt
- azimuth
- binary star
- Black Hole
- blueshift
- Cassegrain
- catadioptric
- celestial sphere
- comet
- conjunction
- constellation
- corona
- cosmology
- Cosmos
- crescent moon
- declination
- deep space
- Dobsonian
- dwarf planet
- dwarf star
- Earth
- eclipse
- ecliptic
- elliptical
- elliptical orbit
- falling star
- field of view
- finderscope
- full moon
- galaxy
- German equatorial mount
- gibbous moon
- gravity
- half-moon
- hyperbolic
- inertia
- inferior planets
- inner planets
- Jupiter
- lens
- light year
- lunar
- magnitude
- Maksutov-Cassegrain
- Mars
- Mercury
- meteor
- meteorite
- Milky Way
- Moon
- nadir
- nebula
- Neptune
- notation
- nova
- open star cluster
- opposition
- outer planets
- parabolic
- penumbra
- perigee
- perihelion
- planet
- Pluto
- pulsar
- quarter moon
- quasar
- red dwarf
- redshift
- Saturn
- Schmidt-Cassegrain
- shooting star
- singularity
- solar
- Solar System
- solar wind
- solstice
- space
- spherical
- star
- stargazing
- Sun
- supernova
- syzygy
- the Solar System planets
- umbra
- Uranus
- Venus
- waning
- waxing
- zenith