Are Pulsars and Quasars Same?

Updated: Feb 21

Pulsars and Quasars sound similar that when discussed or talked about one, we come up with the image of a star with a high pulsating jet stream coming out from its pole.

These two diagrams are the illustration of our pulsar and quasars!

Still, it might be confusing for you to understand the diagram and then judge them to direct their similarities.

Simply stating,

Pulsars are highly magnetized rotating neutron stars, while quasars are extremely powerful and distant active galactic nuclei.

Interesting? cool enough to delve deeper into the topic and understand them separately.


From Earth, pulsars often look like flickering stars. On and off, on and off, they seem to blink with a regular rhythm. But the light from pulsars does not flicker or pulse, and these objects are not stars.

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

They are composed of 10% neutrons and 10% electrons and emit regular pulses of electromagnetic radiation. Pulsars spin very fast. These stars are the products of the explosive transformation of a massive star. The radio waves of a pulsar escape from its north and south magnetic poles.

Pulsars have allowed the experimental testing of general relativity, still physics's best theory of gravitation. Measurements of pulsar signals from pulsars in binary systems have allowed detection of orbital precession, spiraling-in, gravitational redshift (reddening of light traveling against a gravitational field), and other phenomena predicted by general relativity, confirming general relativity's predictions to within .05%.


Quasar is those that look like stars, but they are extremely luminous objects at all wavelengths.

The Redshift exhibited by them reveals that they are at great distances. They are likely to form from black holes when a large part of their mass is converted into energy; Such energy would be what we see as a quasar.

They can release energy capable of illuminating a galaxy and equivalent to millions of suns. Currently, more than 200,000 quasars have been identified.

Quasars are the most energetic objects in the universe, and they thrived when the universe was 10-20% of its present age of 13.7 billion years. Their enormous brightness allows astronomers not only to observe conditions that were present in the early universe but also the intervening matter illuminated by the quasar's light.


  • Pulsars are highly magnetized rotating neutron stars, while quasars are extremely powerful and distant active galactic nuclei.

  • Quasars are bigger than pulsars.

  • Pulsars are less bright than quasars.

  • Quasars are more distant than pulsars.

  • The pulsars have pulse and rotation, while the quasars do not.

  • Quasars are associated with black holes, while pulsars are not.

  • Pulsars are newer than quasars.

Growing scientific knowledge of quasars and pulsars has had a little direct impact on the lives of most persons, who have never even of such objects. However, the knowledge and awareness of black holes, quasars, and pulsars have been crucial to the expansion of modern astronomy's understanding of the structure of the cosmos and the nature of fundamental physical laws.