A Dictionary of Astronomy

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.

Recently added articles from A Dictionary of Astronomy:

α
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21-centimetre line
A Dictionary of Astronomy;
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2 O maser
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30 Doradus
A Dictionary of Astronomy;
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47 Tucanae
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53 Persei star
A Dictionary of Astronomy;
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61 Cygni
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AAO
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AAS
A Dictionary of Astronomy;
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AAT
A Dictionary of Astronomy;
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AAVSO
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A band
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Abell Catalogue
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Abell cluster
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Abell radius
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aberration, constant of
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aberration of starlight
A Dictionary of Astronomy;
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aberration, optical
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ablation
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ablation age
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absolute magnitude
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absolute temperature
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absolute zero
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absorption
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absorption coefficient
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absorption edge
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absorption line
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absorption nebula
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absorption spectrum
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abundance
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Acamar
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acceleration of free fall
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accretion
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accretion disk
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ACE
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Achernar
A Dictionary of Astronomy;
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Achilles
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achondrite
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achromatic
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achromatism
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A-class asteroid
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acronical
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Acrux
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active galactic nucleus
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active optics
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active prominence
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active region
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Adams, John Couch
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Adams Ring
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Adams, Walter Sydney
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adaptive optics
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Adhara
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adiabatic process
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Adonis
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Adrastea
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ADS
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Advanced Composition Explorer
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advance of perihelion
A Dictionary of Astronomy;
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advection
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aeon
A Dictionary of Astronomy;
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