Big Bang
Cepheid variable
Classical Cepheid variable
Type II Cepheid
Cosmic distance ladder
Distance measures (cosmology)
Comoving distance
Doppler effect
Doppler shift
Electromagnetic radiation
Electromagnetic spectrum
Gravitation
Kepler's laws of planetary motion
Light
Light curve
Luminosity
Luminosity distance
Absolute magnitude
Apparent magnitude
Orbit
Recessional velocity
Redshift
Solar mass
Spectroscopy
Spectral line
Astronomical spectroscopy