Thought to be about 20,000 years old — middle-aged for a such a structure — the W44 supernova remnant is located 9,800 light-years away in the constellation Aquila. The Fermi Large Area Telescope (LAT) not only detected W44, it actually...

• Earth Experiences Back-to-Back Asteroid Close Encounters
  

  Earth Experiences Back-to-Back Asteroid Close Encounters

  3 days ago 3 days ago Two small asteroids buzzed by Earth, zooming well within the moon’s...

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• Ghostly Gamma-Ray Beams Blast From Milky Way's Center
  

  Ghostly Gamma-Ray Beams Blast From Milky Way's Center

  As galaxies go, our Milky Way is pretty quiet. Active galaxies have cores that glow brightly...

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• Two Small Asteroids Buzz Earth in One-Two Punch
  

  Two Small Asteroids Buzz Earth in One-Two Punch

  The asteroid 2012 KP24 flew past Earth on May 28, 2012. While the space rock passed within the...

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• Sunlight Nudges Asteroids: Most Precise Measurement of Yarkovsky Effect
  

  Sunlight Nudges Asteroids: Most Precise Measurement of Ya...

  Scientists on NASA's asteroid sample return mission, Origins, Spectral Interpretation, Resource...

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• Our galaxy to hit another in four billion years: NASA
  Our galaxy to hit another in four billion years: NASA

  WASHINGTON — Our galaxy is on a collision course with its nearest neighbor, Andromeda, and the head-on crash is expected in four billion years, the US space agency NASA said on Thursday...

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