absolute magnitude
airglow
Antoniadi scale
aperture
aperture synthesis
apparent magnitude
asterism
astrometry

Bayer designation
Big Dipper
broadband photometry

circumpolar star
comparator
constellations

dawn
deep sky object
disk

Flamsteed number

infrared astronomy
interferometer

light pollution
limb
Little Dipper

naked-eye star
noise

occultation
Orion's Belt

radial velocity method
radio astronomy

scintillation
seeing
spectroscopy
Square of Pegasus
submillimeter wave astronomy
Summer Triangle
surface brightness

Winter Hexagon
Winter Triangle

zodiac