The Bubble Nebula, NGC 7635, is 7 light-years across – about one-and-a-half times the distance from our sun to its nearest stellar neighbor, Alpha Centauri – and resides 7,100 light-years from Earth in the constellation Cassiopeia.
Sharpless 157, also known as the Lobster Claw Nebula (lower right), is a bright emission nebula in the constellation Cassiopeia. It lies just south of the Bubble Nebula.

Technical info:
TS 80mm f6 APO triplet refractor
ZWO ASI 071 MC PRO - temp: -10c - gain 200
IDAS-LPS-P2 filter
Celestron AVX mount
Exposure - 22x 360sec ~ 2 hours
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Canon 40D dslr mono + 12 Nm Ha filter ~ 14.5 hours
Total exposure ~ 16.5 hours

Processed with Astro Pixel Processor - PS CS5