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The Annotated Galactic Center
The center of our Milky Way galaxy can be found some 26,000 light-years away toward the constellation Sagittarius.
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M27: Not a Comet
While hunting for comets in the skies above 18th century France, astronomer Charles Messier diligently kept a list of the things he encountered that were definitely not comets.
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The Elephant's Trunk Nebula in Cepheus
Like an illustration in a galactic Just So Story!
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M82: Galaxy with a Supergalactic Wind
Why is the Cigar Galaxy billowing red smoke?
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Magellanic Galaxy NGC 55
Irregular galaxy NGC 55 is thought to be similar to the Large Magellanic Cloud (LMC).
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4000 Exoplanets
Over 4000 planets are now known to exist outside our Solar System.
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Astronomy Picture of the Day: Highlights of the North Winter Sky
What can you see in the night sky this season? The featured graphic gives a few highlights for Earth's northern hemisphere.
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Astronomy Picture of the Day: Rocket Launch as Seen from the Space Station
Have you ever seen a rocket launch -- from space? A close inspection of the featured time-lapse video will reveal a rocket rising to Earth orbit as seen from the International Space Station (ISS).
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Astronomy Picture of the Day: Highlights of the North Autumn Sky
What can you see in the night sky this season? The featured graphic gives a few highlights for Earth's northern hemisphere.
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Astronomy Picture of the Day: Irregular Galaxy NGC 55
Irregular galaxy NGC 55 is thought to be similar to the Large Magellanic Cloud (LMC).
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