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1 .This is Scientific American 60-Second Space. I'm Clara Moskowitz. Got a minute?
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2 .Two remarkable things about a giant black hole called RX J1131 at the center of a galaxy some 6 billion light years away.
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3 .One: it's the farthest black hole to have its spin measured.
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4 .Two: it's spinning at half the speed of light.
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5 .That's according to a report in the journal Nature.
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6 .Astronomers have wondered, do large black holes grow gradually via steady intake of material;
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7 .or quickly, for example, in a merger with another black hole during a galactic collision.
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8 .Spin offers clues.
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9 .If the merger idea is correct, lots of new material flowing in a single direction feeds a black hole, driving the spin faster one way.
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10 .But a black hole that ate small meals from different directions would receive tiny pushes that cancel each other, and leave the black hole spinning slowly.
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11 .The half-the-speed-of-light-fantastic being tripped by this newly analyzed black hole thus suggests it grew by digesting another black hole in a galaxy merger.
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12 .Our own Milky Way's black hole could be in for a similar fate when we collide with our neighbor, the Andromeda Galaxy.
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13 .Relax, it's not for another four billion years.
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14 .Thanks for the minute, for Scientific American's 60-Second Space. I'm Clara Moskowitz.
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