What is a Quasar?


11:45 AM

1 min read
What is a Quasar? Blog Image


The Hubble Space Telescope recently discovered a pair of quasars from the early universe.

About Quasar:

  • A quasar is an extremely active and luminous type of active galactic nucleus (AGN). 
  • An AGN is nothing more than a supermassive black hole that is active and feeding at the center of a galaxy. 
  • The brightest quasars can outshine all of the stars in the galaxies in which they reside, which makes them visible even at distances of billions of light-years. 
  • Quasars are thought to form in regions of the universe where the large-scale density of matter is much higher than average.
  • Most quasars have been found billions of light-years away. 
  • Quasars emit energies of millions, billions, or even trillions of electron volts. This energy exceeds the total of the light of all the stars within a galaxy. 


Q1)  What is a Black Hole?

A black hole is a place in space where gravity pulls so much that even light can not get out. The gravity is so strong because matter has been squeezed into a tiny space. This can happen when a star is dying.

Source: Hubble discovers unexpected double quasar in early universe