Surf these sites: Eclipsing Binary Stars -- What are Binary Stars? IAU Commision 42 (Close Binary Stars) -- WWW Services The Double Star Library -- The Double Star Library hopes to be a means by which various types of binary and multiple star information can be easily disseminated among binary star astronomers in IAU Commission 26 and related commissions. The Double Star Observer - Journal of binary and multiple star observing -- An amateur/professional publication for the double star observer. A magazine for those who want to observe and measure doubles. The Formation of Binary Stars -- Recent observational investigations of the frequency of occurrence of pre-main-sequence binary stars have reinforced earlier suspicions that binary formation is the primary branch of the star-formation process
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