The observation of binocular double stars is an absorbing pastime and provides a good introduction to some of the "showpieces" of the night sky. It may lead to more detailed telescopic study of these underrated celestial objects or be enjoyed as a hobby in its own right. Either way, it is a most fascinating branch of astronomy.
1 Scagell, R., 1999, Norton's Star Atlas, 21st edition.
2 Hirshfield A. and Sinnott, R., 1997, Sky Catalogue 2000.0, Vol. 2 (second edition), Cambridge University Press.
3 Ropelewski, Michael, 1999, A Visual Atlas of Double Stars, Webb Society (see http://webbsociety.freeserve.co.uk/ notes/doublest01.html)
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