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Caldwell 30 (NGC 7331) Deer Lick Group

NGC 7331 (the brightest galaxy in the picture) is a spiral galaxy of visual magnitude 9.5 and at a distance of 46 million light years. The picture also contains nine fainter galaxies. The most prominent four of these are about 500 million light years away.

This spiral reveals a high level of detail despite the galaxies inclination to the line of sight. This galaxy is particularly interesting because it is so similar to our own galaxy. It has about the save size, a similar sized black hole at the centre and the spiral structure is also similar. Like most spiral galaxies, the nucleus is full of old red stars were as the spiral arms contain young blue stars.


Date Luminance: 29th August 2006
Telescope 250mm F4.8 Newtonian Reflector with coma corrector
Mount Losmandy G11 Gemini
Detector ST-2000xm
Exposure (seconds) 16 x 300s Luminance
Software IRIS