What is the difference between a pulsar and a quasar?

According to modern concepts, a pulsar is a rapidly rotating neutron star with radio emission. The radio beam emanates from the polar regions of the star, therefore it forms a kind of “searchlight”. The Earth periodically falls under this radiation, so there is a feeling that the star is pulsating. Hence the name.
Quasars are active nuclei of distant galaxies with luminosities trillions of times that of the Sun.

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