Nonstellar Objects

Part of the Patrick Moore's Practical Astronomy Series book series (PATRICKMOORE)


Not all parts of our home galaxy are densely populated with stars. We are 4 light years away from the closest star, Proxima Centauri, and in a sphere measuring 20 light years in diameter we would encounter a mere dozen or so stars. Using binoculars and, in some cases, the naked eye we can see in places here and there a more dense group of stars in the sky. We call these star clusters and divide them into two general groups: open and globular.


Black Hole Dark Matter Radio Wave Local Group Open Cluster 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Copyright information

© Springer Science+Business Media, LLC 2009

Authors and Affiliations

  1. 1.LjubljanaSlovenia

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