NGC 7635, Tim Stone
NGC 7635, Tim Stone

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Description

NGC 7635 is an amazing object, a bubble blown into the HII cloud by a ferocious stellar wind from the Wolf-Rayet star below center in this image. The star is far from the center of the bubble, thought to be caused by asymmetry in the density of the HII cloud. There are at least two, and quite possibly three bubbles in the image. The youngest glows with an abundance of oxygen. The second is older, roughly three times the diameter and approximately the same shape. The third, diffused to the point of near unrecognizability, is larger yet, two or three times the second bubble's diameter. These bubbles are explored in a 1995 paper by Greek astronomer P. E. Christopoulou.

This is only my second deep sky image.

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NGC 7635, Tim Stone