The First Exoplanet Discovered: A Zombie World

Today we know of over 4000 exoplanets, or extrasolar planets:  worlds orbiting around stars not our sun.  But in 1992, possibly the first exoplanet ever discovered came in the form that scientists did not expect.  It was a pulsar planet, or a zombie planet, formed from the matter and debris in the aftermath of an exploding star.

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