Astronomy

A
albedo
Alpha Centauri
apastron
aperture
aphelion
apogee
asterism
asteroid
astronaut
astronomer
astronomical unit
astronomy
axial tilt
azimuth
B
background radiation
Bailey's beads
big bang theory
binary star
black body
black hole
bolometer
C
celestial
celestial equator
cislunar
cluster
comet
conjunction
constellation
Coriolis force
corona
cosmic rays
cosmology
cosmonaut
cosmos
crater
crescent moon
D
dark matter
day
declination
deep space
Deneb
density
docking
Doppler shift
double star
Drake equation
dust
dwarf planet
dwarf star
E
Earth
earthbound
eccentricity
eclipse
ecliptic
elliptical orbit
equinox
escape velocity
event horizon
exoplanet
extragalactic
F
falling star
flare
flyby
free fall
full moon
G
galaxy
gamma ray
gas giant
gegenschein
geostationary
geosynchronous
gibbous moon
globular cluster
gravitation
gravitational constant
gravitational lens
gravity
H
H-R diagram
half moon
heliocentric
helium
Hubble telescope
Hubble's law
hydrogen
hyperbolic orbit
hypernova
I
ice giant
inclination
inertia
inferior planets
inner planets
interstellar
interstellar dust
ionosphere
J
Jupiter
K
Kepler's laws
kiloparsec
Kirkwood gaps
Kuiper belt
L
Lagrange points
lens
light-year
local arm
local group
lunar
M
magnitude
mare
Mars
mass
Mercury
meteor
meteor shower
meteorite
meteoroid
Milky Way
minor planet
Mir
moon
muttnik
N
nadir
NASA
nebula
Neptune
neutron star
new moon
north star
nova
O
observatory
occultation
Oort cloud
opposition
orbit
orbital eccentricity
orbital inclination
outer planets
P
parallax
parsec
partial eclipse
penumbra
perigee
perihelion
perturbation
phase
plane of the ecliptic
planet
planetary nebula
planetoid
Pluto
pole star
precession
probe
pulsar
Q
quarter moon
quasar
R
radiant
radiation
red dwarf
red giant star
red shift
revolve
right ascension
rings
Roche limit
rocket
S
satellite
Saturn
scientific notation
scintillation
shooting star
sidereal
singularity
sky
solar
solar system
solar wind
solstice
space
space exploration
space station
spectroscope
spectrum
Sputnik
star
starlight
sun
sunspot
superior planets
supernova
synodic
syzygy
T
telemetry
telescope
terminator
terrestrial
total eclipse
totality
transit
translunar
transneptunian
twinkling
U
umbra
universe
Uranus
V
vacuum
Van Allen belt
variable star
Venus
vernal equinox
visual magnitude
W
waning
wavelength
waxing
weightlessness
white dwarf
white giant
wormhole
X
x-rays
Y
yellow dwarf
Z
zenith
zodiac