Coloured binary stars for small and medium sized telescopes (english version)
Author: Daniel Spitzer
Author Contact: email@example.com
Originally published: The DeepSkyJournal
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Beside galaxies, star clusters an different kinds of diffuse objects, double stars are also deep sky objects. As any other stars they can only be seen as points - that seems to make them less interesting. But many double stars become very aesthetic objects due to the colour contrast of the components e.g. beta Cyg (Albireo). The present article shows a small collection for small and medium sized telescopes.