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M101 - The Pinwheel Galaxy, Alan Howell
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M101 - The Pinwheel Galaxy, Alan Howell

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Description

This galaxy and I have a history. M101 was one of the first galaxies I imaged after cutting my astroteeth on the Andromeda Galaxy many years ago with just a simple DSLR camera and tripod. It has always been difficult to capture from my light polluted suburban sky. But, this week, the skies gave me a brief window of opportunity and I was finally able to capture about 7hrs of exposure time at about 1600mm (f/7) the past couple of nights. So far, this represents the best view yet I've captured from my backyard of this massive galactic beast, The Pinwheel Galaxy. I hope you enjoy it!
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Messier 101 is a classic, face-on, spiral galaxy, also known as the Pinwheel Galaxy, located 25 million light-years away from Earth in the constellation Ursa Major.

The giant spiral disk of stars, dust and gas is 170,000 light-years across — nearly twice the diameter of our galaxy, the Milky Way. M101 is estimated to contain at least one trillion stars. The galaxy’s spiral arms are sprinkled with large regions of star-forming nebulas. These nebulas are areas of intense star formation, created from the giant pink-to-orange-red molecular hydrogen clouds. Brilliant, young clusters of hot, blue, newborn stars trace out the spiral arms, contrasted to the larger, older red stars in the background.

The Pinwheel Galaxy was discovered in 1781 by astronomer Pierre Méchain, one of Charles Messier’s colleagues.

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M101 - The Pinwheel Galaxy, Alan Howell