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The Deaths of Stars – Part 2 of 2A Pulsaris a source of very distinct radio pulses.Discovery of the first pulsar was by Jocelyn Bell in England in August 1967.It pulsed regularly every 1.337 seconds. Pulsars are known by a catalogue number:CP1919. This means "Cambridge Pulsar at sky coordinate 19hours and 19minutes."Thomas Gold realized that a pulsar must be arotating neutron star, with radiowaves spewing out of its magnetic axis while it turns on its rotation axis.There was a pulsar discovered in the Crab Nebula (M1) in 1969 — it’s known to be asupernova remnant! Many pulsars are known but there is only one other example ofa pulsar in supernova remnant. It is in the southern constellation of Vela,somewhere between 6000 and 11000 light years away.We have no record of it having been seen by the ancient Sumerians, even though wehave millions of clay tablets that they left behind.A Black Holeis an object so dense that nothing — not even light — can escape its gravity.The concept of a Black Hole was indirectly invented by John Michell around 1784.

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