BUBBLE NEBULA |
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NGC 7635, a.k.a. the "Bubble Nebula", is an emission nebula in the constellation Cassiopeia. It lies close to the open cluster Messier 52. The "bubble" is created by the stellar wind from a massive hot, young central star. Technical info: Canon 40D MONO (de-bayered sensor) + 12Nm Ha filter exposure ~12 hours |