Space is a big, lonely place, so it"s nice to know we have neighbors. The pictured Andromeda galaxy is our Milky Way"s closest neighbor—right next door at 2.5 million light-years away. Our cordial relationship with Andromeda goes back about 10 billion years to when both galaxies were still forming. But trouble is brewing: Andromeda is on a collision course with the Milky Way, due for impact in 4 billion years. This neighborhood"s about to get rough…
Hey neighbor, it s World Space Week!
Today in History
More Desktop Wallpapers:
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Happy Arbor Day!
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Silver-studded blue butterflies
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Sunbeams across Tartu County, Estonia
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Women s History Month
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Midsummer in Sweden
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Celebrating the first day of spring
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Autumnal equinox
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Inside the Oculus
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Paper lanterns on the longest night
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Burrowing owls
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Mid-Autumn Festival
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Father s Day
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Fall color sweeps across the West
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Tough turf
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Here comes summer
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Bright and colorful peacock feathers
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Barcelona bids farewell to summer
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An enduring vision
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Henningsvær Stadion, Norway
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Cue up the tango music
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A temple, preserved
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Islands that turned the tide
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Humming along
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Smoking nights in Austria
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World Numbat Day
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Macro photograph of a migrant hawker dragonfly
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Central Highlands of Vietnam
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Ravens
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Menton, France
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Dressed for winter fun