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Nasa’s Swift satellite has captured the highest-resolution view of our neighbouring galaxy Andromeda.

Also known as M31, it contains an incredible one trillion stars and is the largest galaxy in our small section of the Universe.

Swift, which usually searches for distant cosmic explosions, turned its incredibly powerful ultraviolet telescope onto our celestial neighbour to achieve the shot.
Enlarge The Andromeda galax

The Andromeda galaxy is the nearest and largest spiral galaxy to our own Milky Way. The Swift satellite has taken its most detailed picture yet of the star cluster

‘Swift reveals about 20,000 ultraviolet sources in M31, especially hot, young stars and dense star clusters,’ said Swift research scientist Stefan Immler.

‘Of particular importance is that we have covered the galaxy in three ultraviolet filters. That will let us study M31′s star-formation processes in much greater detail than previously possible.’

Andromeda, which lent its name to a 1971 science fiction film, is more than 220,000 light-years across and lies 2.5 million light-years away. On a clear, dark night, the galaxy is faintly visible as a misty patch to the naked

Read more: http://www.dailymail.co.uk/sciencetech/article-1220634/Andromeda-Galaxy-captured-crystal-clear-Nasas-Swift-satellite.html#ixzz0U9UnQqXX
The Andromeda galax

The Andromeda galaxy is the nearest and largest spiral galaxy to our own Milky Way. The Swift satellite has taken its most detailed picture yet of the star cluster

Read more: http://www.dailymail.co.uk/sciencetech/article-1220634/Andromeda-Galaxy-captured-crystal-clear-Nasas-Swift-satellite.html#ixzz0U9UtQ1Nw

Between May 25 and July 26, 2008, Swift acquired 330 images of M31. The images represent a total exposure time of 24 hours.

The task of assembling the resulting 85 gigabytes of images fell to Erin Grand, an undergraduate student at the University of Maryland at College Park who worked with Immler as an intern this summer.

‘After ten weeks of processing that immense amount of data, I’m extremely proud of this new view of M31,’ she said.
Enlarge m31

The Swift image has revealed new features not seen in previous composites of M31 (pictured)

Several features are immediately apparent in the new mosaic. The first is the striking difference between the galaxy’s central bulge and its spiral arms.

‘The bulge is smoother and redder because it’s full of older and cooler stars,’ Immler explained.

‘Very few new stars form here because most of the materials needed to make them have been depleted.’

Read more: http://www.dailymail.co.uk/sciencetech/article-1220634/Andromeda-Galaxy-captured-crystal-clear-Nasas-Swift-satellite.html#ixzz0U9VLedAD

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