Category: astronomy (120 terms)
- active galaxy
- asteroid belt
- back hole
- binary system
- black hole
- blazing star
- blue flash
- blue moon
- bow shock
- celestial sphere
- clear the neighborhood
- cluster variable
- cold trap
- comet tail
- contact binary
- cosmic gravitational-wave background
- cosmic ray
- crystal sphere
- dark matter
- dark space
- dark star
- deep space
- double planet
- double quasar
- double star
- dragon's tail
- elephant trunk
- endless galaxy
- ephemeris time
- equinoctial line
- evening star
- false dawn
- fast radio burst
- fingernail moon
- first cosmic velocity
- first light
- frozen star
- full moon
- galactic center
- galactic year
- gravitational wave
- guest star
- harvest moon
- heavenly body
- hydrostatic equilibrium
- ice dwarf
- ice giant
- impact crater
- infant star
- jewel box
- light sector
- light year
- line of centers
- luminosity function
- lunar distance
- lunar month
- lunar orbit
- main belt
- main sequence
- major axis
- major planet
- moon rock
- moon unit
- morning star
- multiple star
- music of the spheres
- new moon
- old moon
- optical astronomy
- optical spectrum
- outer space
- planetary object
- point source
- polar axis
- pole star
- primum mobile
- pulsar clock
- quadrant plate
- quadruple star
- quasi-stellar object
- quasi-stellar radio-source
- queen of the night
- radial velocity
- radio star
- radius vector
- rotational period
- satellite planet
- second cosmic velocity
- semimajor axis
- shooting star
- sidereal day
- sidereal period
- sidereal year
- smuggler's moon
- snow line
- space flight
- space shuttle
- space suit
- space technology
- spiral nebula
- star chart
- star factory
- star system
- submillimeter wave radiation
- sun filter
- super weakly interacting massive particle
- synodic month
- target of opportunity
- termination shock
- terrestrial telescope
- terrestrial time
- tertiary planet
- third cosmic velocity
- time sight
- triple star
- tropical year
- twilight zone
- white night
- yellow dwarf
- young moon