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 Mothers Day!
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The largest American bison around
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The ruins of a Maya superpower
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National Napping Day
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National Park Service anniversary
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Here’s why landmarks are going dark
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Baltic Sea, Estonia
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Panda Day
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Pollinator Week
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Ukrainian Independence Day
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Books for children of all ages
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Sweet! It’s maple syrup season
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A narrow passage
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Celestial Spain
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Up on the glacier
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It s National Camera Day. Get the picture?
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It s World Bee Day
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Fall comes to Pando
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It s Asian American and Pacific Islander Heritage Month
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Antarctica Day
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From Sputnik to extraterrestrial storms
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Fiddlehead fern fronds
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Ice and Snow Sailing World Championships
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Midwinter freeze
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Where the glow of the holidays lingers
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Happy Arbor Day!
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For Hispanic Heritage Month: Out of Many, One
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World Philosophy Day
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Spring equinox
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Celebrating Mexico in a Cultural Capital