Astronomers Scan 800 Pulsars to See If Any of Them Have Planets

Astronomers discovered the first exoplanets in 1992. They found a pair of them orbiting the pulsar PSR B1257+12 about 2300 light-years from the Sun. Two years later they discovered the third planet in the system. Now a team of astronomers are trying to duplicate that feat by searching 800 known pulsars for exoplanets. The team …