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Written by expert contributors and covering topics from black holes to white dwarf stars, A Dictionary of Astronomy is an authoritative dictionary of astronomy. A Dictionary of Astronomy includes over 4,000 entries, from astrophysics and cosmology to the quasar and relativity, with biographical entries on famous historical figures.
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α
δ
Å
Ångström, Anders Jonas
Öpik, Ernst Julius
21-centimetre line
30 Doradus
47 Tucanae
53 Persei star
61 Cygni
A band
A star
A to Z of variable star types, An
A-class asteroid
AAO
AAS
AAT
AAVSO
Abell Catalogue
Abell cluster
Abell radius
aberration of starlight
aberration, constant of
aberration, optical
ablation
ablation age
absolute magnitude
absolute temperature
absolute zero
absorption
absorption coefficient
absorption edge
absorption line
absorption nebula
absorption spectrum
abundance
Acamar
acceleration of free fall
accretion
accretion disk
ACE
Achernar
Achilles
achondrite
achromatic
achromatism
acronical
Acrux
active galactic nucleus
active optics
active prominence
active region
Adams Ring
Adams, John Couch
Adams, Walter Sydney
adaptive optics
Adhara
adiabatic process
Adonis
Adrastea
ADS
advance of perihelion
Advanced Composition Explorer
advection
Ae star
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