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Tracking the first interstellar asteroid back to its home star

Tracking the first interstellar asteroid back to its home star

9 November 2017

Last month, astronomers saw the first asteroid from outside our solar system speed by. Now, they're tracing its orbit back to find out where it came from
Pierre Auger Observatory

Far-off galaxies are firing rare high-energy cosmic rays at us

21 September 2017

The highest energy particles in the universe hit Earth very rarely, so it took 10 years of data to pinpoint their origin. They’re coming from galaxies far, far away

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