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“Mystery”

Aug 4, 2015 01:28 PM ET // Ian O'Neill
Astronomers have announced the discovery of a truly monstrous structure consisting of a ring of galaxies around 5 billion light-years across -- and it defies cosmological theory.
Jul 31, 2015 05:03 PM ET // Ian O'Neill
In new observations beamed back from Cassini, Saturn's icy moon Tethys has decided to show off its mysterious stripes.
Jul 21, 2015 06:13 PM ET // Ian O'Neill
You'd be forgiven for thinking that the only dwarf planet news right now is on Pluto, but Pluto isn't the only small world with interesting stuff going on.
Jul 8, 2015 02:18 PM ET // Ian O'Neill
A space telescope designed to look into the furthest-most reaches of space at some of the most energetic phenomena in the known universe has, once again, been turned to face our nearest star.
Jun 23, 2015 08:54 AM ET // Irene Klotz
From its orbital perch 2,700 miles above Ceres, NASA's Dawn spacecraft returned new images of the dwarf planet showing more even more small bright spots inside a 55-mile crater.
Jun 11, 2015 06:12 PM ET // Ian O'Neill
As NASA's New Horizons spacecraft careens through the solar system with Pluto in its cross-hairs, new detail in the dwarf planet's surface is popping into view at an ever increasing rate.
Jun 10, 2015 09:39 PM ET // Ian O'Neill
Although NASA's Dawn mission is now carrying out its second mapping orbit of dwarf planet Ceres we're still none the wiser as to what those weird bright patches are.
Jun 2, 2015 04:33 PM ET // Ian O'Neill
Strange bright swirls have long been known to exist on the moon's surface and their origin is steeped in mystery -- might comets be the culprit?
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