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The Crab Pulsar (PSR B0531+21) is a relatively young neutron star. The
star is the central star in the Crab Nebula, a remnant of the supernova
SN 1054, which was widely observed on Earth in the year 1054.Discovered
in 1968, the pulsar was the first to be connected with a supernova
remnant.

The optical pulsar is roughly 20 km in diameter and the pulsar
“beams” rotate once every 33 milliseconds, or 30 times each second

The above video allows you to hear the signal from pulsar and the gif below that is the actual pulsar blinking taken with a high speed technique known as  Lucky Imaging .

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