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Astronomy Picture of the Day
Ultraviolet Andromeda
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zorg.ch
#112833
by
[z]Barbara Harris
@
28.10.2010 00:00
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Ultraviolet Andromeda
Explanation: This stunning vista represents the highest resolution image ever made of the
Andromeda Galaxy (aka M31) at ultraviolet wavelengths
. Recorded by
NASA's Swift satellite
, the mosaic is composed of 330 individual images covering a region 200,000 light-years wide.
It shows about 20,000 sources
, dominated by hot, young stars and dense star clusters that radiate strongly in
energetic ultraviolet
light.
Of course, the Andromeda Galaxy
is the closest large spiral galaxy to our own Milky Way, at a distance of some 2.5 million light-years. Just slide your cursor over the image to compare the appearance of this
gorgeous island universe
in optical light with its ultraviolet portrait.
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