Pairs of stars that orbit a common centre of mass, together with chance optical doubles that only look close together from Earth. A system belongs here when its cited article calls it a binary star, double star or optical double. Members are placed here from their own cited Wikipedia articles, each with a verbatim supporting quotation, so a reader can check why an entry sits in this group. The grouping forms part of the browse path for this section of the atlas.
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Binary and Double Star Systems
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Mira (Wikipedia)
Has Member: Mira, Lead sentenceQuote, Has Member: Mira, Lead sentence
Mira (pronounced , MY-rÉ™) is a binary star system in the constellation Cetus.
Albireo (Wikipedia)
Has Member: Albireo, Lead sentenceQuote, Has Member: Albireo, Lead sentence
Albireo is a double star in the southern constellation of Cygnus.
Messier 40 (Wikipedia)
Has Member: Messier 40, Lead sentenceQuote, Has Member: Messier 40, Lead sentence
Winnecke 4 (also known as Messier 40 or WNC 4) is an optical double star consisting of two unrelated stars in a northerly zone of the sky, Ursa Major.
Sirius (Wikipedia)
Has Member: Sirius, Lead sentenceQuote, Has Member: Sirius, Lead sentence
Sirius is a binary star consisting of a main-sequence star of spectral type A0 or A1, termed Sirius A, and a faint white dwarf companion of spectral type DA2, termed Sirius B.
Procyon (Wikipedia)
Has Member: Procyon, Lead sentenceQuote, Has Member: Procyon, Lead sentence
A binary star system, Procyon consists of a white-hued main-sequence star of spectral type F5 IV-V, designated component A, in orbit with a faint white dwarf companion of spectral type DQZ, named Procyon B.
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