Topic: SPORT - on August 12, 2014 at 4:54:00 PM CEST
World Yo-Yo Champion Performs Hypnotizing Routine
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Topic: Space - on August 12, 2014 at 4:52:00 PM CEST
"Monsters at the End of the Universe" --Black Holes with Masses Equaling Billions of Suns
At the ends of the Universe there are black holes with masses equaling billions of our sun. These giant bodies – quasars – feed on interstellar gas, swallowing large quantities of it non-stop. Thus they reveal their existence: The light that is emitted by the gas as it is sucked in and crushed by the black hole's gravity travels for eons across the Universe until it reaches our telescopes. Looking at the edges of the Universe is therefore looking into the past. These far-off, ancient quasars appear to us in their infancy, taken less than a billion years after the Big Bang. Since these ancient quasars were first discovered, scientists have wondered what process could lead a small black hole to gorge and fatten to such an extent, so soon after the Big Bang.
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