2018 Fall Contours
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Ghost particle solves mystery of high-energy cosmic rays
For more than 100 years, astrophysicists have been puzzled by the source of high- energy neutrinos, known as cosmic rays, that travel to Earth at the speed of light. A global team of researchers believes they’ve now found the answer to the extraterrestrial mystery: a blazar—a giant elliptical galaxy with a massive, rapidly spinning black hole at its core.