Star Cluster M52 & Bubble Nebula (NGC 7635)

This is the first frame of a planned 2-3 frame mosaic on the border of the constellations Cassiopeia and Cepheus. At lower right is the open cluster M52. (Note that there is no star color in this image, since it was shot with narrow band filters.) At upper right is the beautiful Bubble Nebula (NGC 7635), while to the left are gas clouds and another Nebula. The aptly named Bubble Nebula is a shell of gas created by the outflowing stellar wind of a massive central star, and is estimated to measure approximately 7 light years across. This has been processed in a modified Hubble palette, and the planned mosaic will extend the upper edge of the image to the emission nebula Sh 2-157.