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Dead planets beam ‘zombie’ radio signals into space for up to a billion years, scientists say

zombie planets

New exoplanet discoveries have been popping up with increasing regularity in recent years thanks to technological advances that allow scientists to spot evidence of their existence from afar. Spotting a dip in the brightness of a star is one of the easiest ways to find planets, but new research shows that it's also possible to spot "dead" planets orbiting burned-out stars just by listening for them.

A new study published in Monthly Notices of the Royal Astronomical Society explains how metal-rich planetary cores that survive around white dwarf stars actually beam a radio signal into space that can be detected from Earth for hundreds of millions or even a billion years.››

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Dead planets beam ‘zombie’ radio signals into space for up to a billion years, scientists say originally appeared on BGR.com on Sun, 11 Aug 2019 at 14:08:00 EDT. Please see our terms for use of feeds.

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