Under a dark sky not too seems an empty area between the bright Castor and Pollux, the brightest st

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Under a dark sky not too seems an empty area between the bright Castor and Pollux, the brightest stars of Gemini and Leo. All the stars of Cancer have a modest brightness and are not easy to trace.
This stellar clusters by us is 577 years light and contains about 500 stars in a region of space 15 light years. In the sky is visible to the naked eye as a portion of the sky slightly clearer.
In 280 BC Arato and Theophrastus wrote that when the praesepe appeared weak or was not visible then it was going to rain, although no one could see clouds in the sky. The Chinese mythology was far more gruesome, the astronomers of the Celestial calibre 50 Empire called calibre 50 this group of stars "the souls of the corpses accumulated." calibre 50 The open star clusters
An open cluster is a group of stars born together from a giant molecular cloud, and yet united by their mutual gravitational attraction. They are young objects (astronomically speaking), and contain so many hot stars and bright. This makes open clusters visible from great distances, as well as one type of objects are easy to observe even with small instruments. calibre 50 The molecular cloud "parent" is sometimes calibre 50 still associated storage, which illuminates some parts that become visible as one or more nebulae. All the stars in an open cluster have approximately the same age and the same chemical composition, so any difference between them is solely due to their mass. (..)
The sky at night ...
Perinaldo, Poggio delle Stelle, the birthplace of Gian Domenico Cassini, with its magnificent and clear starry sky, invites you to discover his astronomical journey, an original and unique. A few minutes drive to forget the intrusive lights of the magnificent coastline of the Ligurian Riviera and discover much more feeble, remote and fascinating lights of the starry sky. MORE INFO.