JERRY LODRIGUSS / SCIENCE PHOTO LIBRARY JERRY LODRIGUSS / SCIENCE PHOTO LIBRARY
M52 Open Cluster, NGC 7635 The Bubble Nebula in Cassiopeia M52 is a large open cluster located in the Milky Way. With an overall brightness of about magnitude 7, it contains about 200 stars, the brightest of which is magnitude 8.2. The cluster is about 35.
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