An open cluster is a group of up to a few thousand stars that were formed from the same giant molecular cloud, and are still loosely gravitationally bound to each other. In contrast, globular clusters ...
If you have the time and clear sky to the north, you might want to check out an open cluster that is seldom observed. An “average joe” open cluster in Cassiopeia nonetheless appears fairly bright and ...
The European Southern Observatory’s (ESO) New Technology Telescope (NTT) has captured a striking image of the open cluster NGC 2100. This brilliant star cluster is around 15 million years old and ...
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