Best of AOP - Galaxies

NGC 6822

At a distance of 1.7 million light years away, NGC 6822 is literally right around the corner. This galaxy is a dwarf with a mere 10 million stellar members in its ranks. Note the "bubble" of gas in the top right corner. This bubble was probably caused by stars that formed from their natal gas cloud. Upon their birth, the extra gas in the cloud was expelled into space- pushed out by the energetic stellar winds of the baby stars. Since this galaxy (especially on the outskirts) does not have much in the way of internal motions, the bubble of gas continues to expand without anything disrupting it. (For those with good eyes... there are actually a few other bubbles in this image as well).

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Last Updated: 30-Apr-2014

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About This Image

Click on image for larger version.

Equipment

20in RC Optical Systems telescope Operating at f/5.3

Paramount ME Robotic Telescope Mount

SBIG ST10XME CCD camera with color filter wheel

LRGB color production was used to create this image.

If done again, this image would need longer exposures in both luminance and color components.

Luminance = 75 minutes binned 1x1

Red = 15 minutes binned 2x2

Green = 15 minutes binned 2x2

Blue = 15 minutes binned 2x2

Minimum credit line: Julie and Jessica Garcia/Adam Block/NOAO/AURA/NSF