Posted on Dec 12, 2018
“We have the Local Bubble in the interstellar medium. We’re right on its edge,” says Adrian Melott at the University of Kansas. “It’s a giant region about 300 light years long. It’s basically very hot, very low-density gas — nearly all the gas clouds have been swept out of it. The best way to manufacture a bubble like that is a whole bunch of supernovae blows it bigger and bigger, and that seems to fit well with idea of a chain. When we do calculations, they’re based on the idea that one supernova that goes off, and its energy sweeps by Earth, and it’s over.
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Posted on Dec 12, 2018
The “Planet Earth Report” connects you to the days’ headlines on the discoveries, people, and events changing our planet and the future of the human species.
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