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What Happened Before the Big Bang?
What existed before the big bang? What is the nature of time? Is our universe one of many? On...
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Mysterious Galaxy Possibly Made of Dark Matter
A team of astronomers has identified a new galaxy that may be made completely of dark matter, the second...
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An Otherworldly Discovery: Billions of Other Planets
Astronomers have determined that each of the 100 billion stars in the Milky Way probably has at least one...
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‘El Gordo’ is Largest Distant Galaxy Cluster Ever Seen
Galaxy clusters are the largest stable structures in our Universe. Seven billion light years away and with two million...
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Star Birth (and Murder) Spied in Cygnus X
Baby stars don’t get an easy ride during their early years; they are born into stellar nurseries bubbling with...
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Hubble Spots Farthest Primordial Galaxy Cluster
Astronomers have discovered the most distant developing galaxy cluster known to date, shedding light on the formation of large-scale...
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Searching for Goldilocks
At least four times in the last few years, astronomers have announced they have found planets orbiting other stars...
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Blinged-Out Stars Were Born Rich
At first glance, CS 22892-052 looks like a run-of-the-mill old star. Born about 13 billion years ago, only 700...
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How the Cosmic Fog Cleared
Two studies shed additional light on a murky question: How did the cosmic fog that enveloped the universe in...
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The First Direct Image of a Baby Planet Being Born! (Maybe!) (But Probably!)
Astronomers may have, for the first time, directly imaged a planet still in the process of formation, gathering material...