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A new model suggests the Milky Way's supermassive black hole sacrifices its own energy to boost cosmic rays.
“In this artist’s conception, the black hole at the center of our galaxy is surrounded by a hot disk of accreting material. Blue lines trace...
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“A 1977 theory known as quadratic gravity was long left to languish because of its negative-energy “ghost” particle. But the ghost might not... -
“Timing delays in quasar light bent by massive galaxies offer a fresh way to measure the universe’s expansion, and the results deepen the ri... -
String theory. The string model is one of the attempts to explain the universe. This theory could explain almost everything. The mainframe o...
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