Astronomy
Articles about stars, planets, space and the universe.
Australian Aboriginal astronomy
Autonoe (moon)
Autonoe (Jupiter XXVIII)
Axial tilt
Axis of rotation
Baby boom galaxy
Barnard's galaxy
Barnard's Galaxy (NGC 6822): a nearby barred irregular galaxy
Barnard's Loop
Barnard's Loop — the large emission arc in Orion
Barnard's star
Barycenter
Bayer designation
Beagle 2
Bebhionn (moon)
Bebhionn (moon of Saturn)
Belinda (moon)
Belinda — an inner moon of Uranus
BepiColombo
Bergelmir (moon)
Bergelmir — a small irregular moon of Saturn
Berlin Observatory
Berlin Observatory (Berliner Sternwarte)
Historic astronomical institution in Berlin, founded from early-18th scientific societies; developed observational, timekeeping and calendrical work and evolved through several sit
Bernard Lovell
Sir Bernard Lovell — pioneering English physicist and radio astronomer
Bestla (moon)
Beta Centauri
Beta Centauri (Hadar, Agena) — bright triple star in Centaurus
Beta Columbae
Betelgeuse
Bianca (moon)
Bianca (Uranian moon)
Big Bang
Big Bang (cosmology)
Binary pulsar
Binary star
Black dwarf
Black dwarf (stellar remnant)
Black Eye galaxy
Black hole
Black hole: formation, structure, detection, and significance
An overview of black holes: their structure, formation channels, observational methods, theoretical properties like Hawking radiation, and their role in astrophysics and open quest
Blazar
Blue shift
Blueshift: the Doppler shift toward shorter wavelengths
Bolometric magnitude
Bond albedo
Boötes
Brown dwarf
Bya (unit)
Bya (unit) — “billion years ago” in geology and astronomy
C-type asteroid
Caelum
Caelum (constellation)
Caesar's Comet
Caesar's Comet (Comet C/-43 K1)
Caldwell catalogue
Caldwell catalogue: a complementary list of bright deep‑sky objects for observers
Caliban (moon)
Callirrhoe (moon)
Callirrhoe (Jupiter XVII) — irregular moon of Jupiter
Callisto (moon)
Calypso (moon)
Camelopardalis
Camelopardalis — the faint northern constellation representing the giraffe
Cancer (constellation)
Canes Venatici
Canes Venatici — the Hunting Dogs constellation
Canis Major
Canis Major: Southern Constellation Containing Sirius and VY Canis Majoris