The Oldest Objects in the Universe

NASA's Spitzer space telescope took this photo of bizarre objects that existed more than 13 billion years ago:

An Australian astrophysicist, Ray Norris, said the NASA team may have found "the holy grail" of astronomy.

What the ancient objects are remains a mystery. One possibility is stars, the first to light up after the dawn of time. They would have been "humungous", said NASA, "more than 1000 times the mass of our sun". Or they may be "voracious black holes". While black holes are invisible, heat emitted by matter plunging into them can be detected.

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