Pulsars

The first pulsar was discovered on November 28th, 1967 by Jocelyn Bell Burnell and Antony Hewish. It was identified as a pulsar by Thomas Gold and Franco Pacini.  Pulsars are so dense then even a tiny drop of them would outway the Great Pyramid at Giza. Because the  mass is so concentrated, the force of gravity is probably about 100 billion times stronger than on the surface of the earth. Another interesting thing about pulsars is that they rotate quite fast. The fastest rotation of a pulsar is 716 times per second. The face of a pulsar is smooth, with the largest irregularity the thickness  of a dime.

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