Abell cluster
accretion disk
active galactic nucleus
ambipolar diffusion
annihilation
axion

Big Bang
binary pulsar
bipolar flow
BL Lacertae object
Blaauw mechanism
black dwarf
black hole
blazar
Blazkho effect
bolometric magnitude
brightness temperature
Butcher-Oemler effect

carbon burning
carbon-nitrogen cycle
circumstellar maser
cluster of galaxies
color index
color-magnitude diagram
cosmic background radiation
cosmic distance ladder
cosmic rays
cosmological constant

dark energy
dark matter
degenerate matter
density wave
Doppler effect

emission nebula

fast radio burst
Fermi acceleration
forbidden line

galaxy
gamma-ray burst
giant molecular cloud
gravitational lens
gravitational waves

H I region
H II region
Hayashi track
helium burning
Hertzsprung-Russell diagram
Hubble law
hydrogen burning

infrared astronomy
intergalactic absorption
intergalactic medium
interplanetary magnetic field (IMF)
interplanetary medium
interstellar extinction
interstellar maser
interstellar medium (ISM)
interstellar polarization
intra-cluster medium
ionization front
ionization temperature

Jeans length
jet (astrophysical)

Kelvin-Helmholtz contraction
Keplerian rotation curve
kinetic temperature

Laing-Garrington effect
large-scale structure
Lense-Thiring effect
light curve
light echo
line broadening
local standard of rest
luminosity
luminosity function

magnetar
magnitude
main sequence
many-body problem
mass function
mass-luminosity ratio
mass-luminosity relation
mass-luminosity-radius relation
mass-radius relation
millisecond pulsar
molecular cloud

nebula
neutron star
non-radial pulsation

period-luminosity relation
period-mass relation
period-spectra relation
polarization
population
proton-proton chain
pulsar

quark star

radial pulsation
radiation temperature
radio galaxy
Rayleigh-Taylor instability
Roche limit
Roche lobe
rotation curve
r-process

Schõnberg-Chandrasekhar limit
Schwarzschild radius
Seyfert galaxy
shell burning
shock wave
soft gamma repeater
Spitzer-Schwarzschild scattering mechanism
s-process
star
starburst galaxy
stellar atmosphere
stellar evolution
stellar wind
sterile neutrino
Strömgren sphere
Sunyaev-Zel'dovich effect
superluminal radio source
supermassive black hole
supernova
supernova imposter
supernova remnant
symbiotic star
synchrotron radiation

three-body problem
tidal force
tidal heating
tidal lock
triple-alpha process
21-centimeter line

ultra-luminous cluster
ultra-luminous infrared galaxy

Van Allen belts
Vogt-Russell theorem
void

white dwarf
Wolf-Rayet star

X-ray binary
X-ray burst
X-ray cluster
X-ray transient

Yarkovsky effect