A
Aberration, chromatical
Aberration, spherical
Aberration of light
Almagest
Altitude
Aperture
Aphelion
Apogee
Apparent SolarTime (AST)
Asterism
Asteroid
Astrology
Astronomical Unit
Astronomy
Azimuth
B
Bearing
Binary star
Bolide
C
Celestial latitude
Celestial longitude
Comet
Conjunction
Constellation
Corona
D
Declination (Dec.)
E
Eccentricity
Eclipse
Ecliptic
Ellipse
Elongation
Ephemeris Time (ET)
Equation of Time
Equator, celestial
Equator, galactic
Equinox
Eyepiece
G
Galaxy
Gibbous
Granulation
H
Horizon
Hour angle
Hour circle
L
Light-year
Limb
Longitude difference
M
Magnitude, stellar
Meridian, celestial
Meteor
Meteor shower
Meteorite
N
Nebula, dark
Nebula, gaseous diffuse (gn)
Nebula, planetary (pn)
NGC
Node
Nova
Nutation
O
Objective
Oblateness
Occultation
Opposition
P
Parallax
Perigee
Perihelion
Planet
Position angle (PA)
Precession of the equinoxes
Prime vertical
Prominence
Proper motion
Q
Quadrature
R
Radiant
Retrograde motion
Revolution
Rift
Right ascension (RA)
Rotation
S
Satellite
Shooting star
Sidereal time
Solar wind
Solstice
Spectral type
Spectrum
Star
Stereographic projection
Sun
Sun, active
Sun, quiet
Sunspot
Supernova
Supernova Remant
T
Telescope
Telescope, catadioptric
Telescope, reflecting
Telescope, refracting
Telescope mounting, altazimuth
Telescop mounting, equitorial
Terminator
Time, Local Mean (LMT)
Time, Standard Mean (SMT)
Transit
V
Variable star
Vertical circle
W
Wane
Wax
Z
Zenith
Zodiac
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