Difference Between Quasar and Pulsar

The universe surrounds mysteries that cause us astonishment and that motivate scientists to want to discover more and more, in order to not only find answers to some things that we do not understand; but also to better understand our origin. Difference Between Quasar and Pulsar

Undoubtedly, in space there are still many things to discover. Millions of stars, millions of planets, and we also need to understand more about black holes, quasars and pulsars; but what are those last two? If you do not know, then we explain.

PRESS  Difference Between Quasar and Pulsar

The first pulsar was discovered in 1967 by Anthony Hewish and Jocelyn Bell at the Cambridge Radio Astronomy Observatory. The discovery happened accidentally.

A pulsar is a neutron star that periodically emits radiation It is made up of three layers: a solid core, a “liquid” mantle, and a thin, solid crust.

It is entirely composed of neutrons and emits regular pulses of electromagnetic radiation. Pulsars spin very fast. These stars are the products of the explosive transformation of a massive star. Radio waves from a pulsar escape from its north and south magnetic poles.


Also called a quasar. Quasars look like stars, but they are extremely luminous objects at all wavelengths.

The first quasars were discovered in the 1960s, during the measurement of radio emissions derived from them. However, later many similar objects were found and they do not emit radio waves. They are believed to be at the center of active galaxies where black holes reside.

The redshift exhibited by them reveals that they are at great distances. It is probable that they are formed from black holes, when a large part of their mass is converted into energy; said energy would be what we see as a quasar.

They can release energy capable of illuminating a galaxy and equivalent to millions of suns. A today, more than 200 thousand quasars have been identified. É these are between 780 million and 28 trillion light years from us.

Key differences between quasar and pulsar

  • Pulsars are highly magnetized spinning neutron stars, while quasars are extremely powerful and distant active galactic nuclei.
  • Quasars are larger than pulsars.
  • Pulsars are less bright than quasars.
  • Quasars are more distant than pulsars.
  • Pulsars have pulse and rotation, while quasars do not.
  • Quasars are associated with black holes, while pulsars are not.
  • Pulsars are newer than quasars.

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