SH2-157 Lobster Claw Nebula and Friends

Within this image are a few notable nebulas and star clusters. The main image is SH2-157 commonaly known as the Lobster nebula.

Above this is NGC 7635, also known as the Bubble Nebula, Sharpless 162, or Caldwell 11, is an H II region emission nebula in the constellation Cassiopeia. It lies close to the direction of the open cluster Messier 52. The “bubble” is created by the stellar wind from a massive hot, 8.7 magnitude young central star, SAO 20575 (BD+60°2522) The nebula is near a giant molecular cloud which contains the expansion of the bubble nebula while itself being excited by the hot central star, causing it to glow. It was discovered in 1787 by William Herschel. 

Just too the right is NGC 7538 a diffuse nebula . This is home to the biggest yet discovered protostar which is 300 times the size of the solar system. Star in the NGC 7538 are mainly low-mass pre main sequence stars.

There a 2 star cluster within the image M52 (just to left and up of bubble nebula) also know as NGC 7654, is an open cluster of stars. NGC 7510 is an open cluster of stars located (to the right and tip of the lobsterclaw) around 11,400 light years away in the constellation Cepheus, near the border with Cassiopeia.