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1:23
Did you know the first planets to be discovered outside our solar system were given the rather ominous names Poltergeist and Phobetor? Known as exoplanets they were discovered in 1992. Before that, we didn't know if planets existed outside our solar system. The two astronomers who discovered them, Alex Wolszczan and Dale Frail, weren't actually hunting for other planets. They were studying pulsars - dead, rapidly rotating neutron stars - at the Arecibo Observatory in Puerto Rico. Noticing
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