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“Mystery”

May 14, 2015 07:00 AM ET // Charles Q. Choi, SPACE.com
Astronomers may have solved the decades-long cosmic murder mystery of what kills most galaxies in the universe: They are strangled to death, so they can no longer create new stars.
May 14, 2015 02:00 PM ET // Irene Klotz
Astronomers have found a quartet of quasars embedded in a single cloud of cold gas, a discovery that challenges currently held theories about how these rare objects form.
Mar 18, 2015 02:25 PM ET // Irene Klotz
Scientists using NASA’s Mars-orbiting MAVEN spacecraft discovered a mysterious cloud of dust hundreds of miles above the planet’s surface -- and no explanation for how it got there.
Mar 10, 2015 06:07 PM ET // Ian O'Neill
A dwarf galaxy orbiting the Milky Way is humming with gamma rays, leading astronomers to hypothesize that it could be filled with annihilating dark matter particles.
Feb 25, 2015 02:40 PM ET // Ian O'Neill
As NASA's Dawn mission slowly spirals in on its dwarf planet target, Ceres' alien landscape is becoming sharper by the day.
Feb 18, 2015 01:05 PM ET // Ian O'Neill
It has long been assumed that the size of a supermassive black hole in a galaxy's core is intimately related to the number of stars that galaxy contains -- but it might not be that simple.
Feb 16, 2015 11:00 AM ET // Irene Klotz
Amateur astronomers gazing at Mars discovered gigantic plumes soaring more than 125 miles above the planet’s surface, a phenomenon that so far defies explanation.
Jan 24, 2015 06:00 PM ET // Calla Cofield, SPACE.com
A strange, flickering white blotch found on the dwarf planet Ceres by a NASA spacecraft has scientists scratching their heads.
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