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Inside the Crab nebula, there sits a pulsar: the rapidly spinning neutron star
is another left-over of the supernova explosion, being the remains of the core
of the progenitor star. It emits a narrow beam of radiation into its suroundings,
like the beam of a lighthouse. 30 times a second, this beam hits the Earth
and a radio flash is observed ...
The plot shows the pulse of a different pulsar - B0329+54, the strongest on in
the northern sky, with a period of 0.7145 s. More about
Our pulsar observations
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