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Facts for Prelims (FFP)


Source: CNN

 Context: Astronomers have discovered the brightest object in the universe, a quasar powered by the fastest-growing black hole on record.

  • Initially mistaken for a star, the quasar, named J0529-4351, was found using the European Southern Observatory’s Very Large Telescope.
  • It is located over 12 billion light-years away and its black hole devours the equivalent of one sun per day, with a mass 17 billion times that of our sun.


Difference between Blazars and Quasars:

OrientationJet observed almost end-onJet observed at larger angles
Spectral FeaturesFaster-than-light movementsBroad optical lines, thermal spectra
Smooth energy distributionsX-ray emission features
Luminosity varies on short timescalesLuminosity varies over longer periods
Relativistic jet pointing towards EarthAngled view of the accretion disk


A quasar is a bright core of a distant galaxy that is powered by a supermassive black hole. Quasars are a subclass of active galactic nuclei (AGNs), which are extremely luminous galactic cores where gas and dust fall into a supermassive black hole. Quasars are also known as quasi-stellar objects, abbreviated QSO.