Daily Current Affairs for UPSC Civil Services Exam – 28 August 2021

In Today’s News:

  1. Three supermassive blackholes merging together discovered.
  2. 557 new species added to India’s faunal wealth.
  3. Deepor Beel Wildlife sanctuary.

1. Three supermassive blackholes merging together discovered

News Summary

Indian researchers have discovered three supermassive black holes from three galaxies merging together to form a triple active galactic nucleus.

Prelims GS – Science & Technology

Supermassive black holes:
  • Supermassive black holes are difficult to detect because they do not emit any light. But they can reveal their presence by interacting with their surroundings.
  • When the dust and gas from the surroundings fall onto a supermassive black hole, some of the mass is swallowed by the black hole, but some of it is converted into energy and emitted as electromagnetic radiation that makes the black hole appear very luminous.
  • They are called active galactic nuclei (AGN) and release huge amounts of ionized particles and energy into the galaxy and its environment.
  • While studying a known interacting galaxy pair, NGC7733, and NGC7734, a team of researchers from the Indian Institute of Astrophysics detected unusual emissions from the center of NGC7734.
  • The UV and H-alpha images also supported the presence of the third galaxy by revealing star formation along with the tidal tails, which could have formed from the merger of NGC7733N with the larger galaxy.
  • Each of the galaxies hosts an active supermassive black hole in their nucleus and hence form a very rare triple AGN system.
  • Triple AGN is extremely rare.

Click here to view the Courtesy: official PIB release.

2. 557 new species added to India’s faunal wealth

News Summary

A document published by the Zoological Survey of India revealed that India has added 557 new species to its faunal wealth in 2020.

Prelims GS – Environment

Some new interesting species and their locations:
  • Trimeresurus Salazar, a green pit viper  in Arunachal Pradesh
  • Lycodon deccanensis, the Deccan wolf snake in Karnataka and
  • Sphaerotheca Bengaluru, a burrowing frog named after the city of Bengaluru.
  •  Xyrias anjaalai, a deep water species of snake eel in Kerala
  • Glyptothorax giudikyensis, a species of catfish in Manipur
  • Clyster galateansis, a species of scarab beetle in the Great Nicobar Biosphere.

3. Deepor Beel wildlife sanctuary

News Summary

The Ministry of Environment, Forest, and Climate Change notified the eco-sensitive zone of Deepor Beel Wildlife Sanctuary

Prelims GS – Geography/Environment

Deepor Beel Wildlife sanctuary:
  • Deepor Beel Wildlife sanctuary is located about 10 km Southwest of Guwahati, Assam.
  • Deepor Beel is one of the Important Bird Area (IBA) sites by Birdlife International.
  • Deepor Beel has also been designated as a Ramsar Site in November 2002.
  • Deepar Beel is one of the largest freshwater lakes in Assam.
  • It is the State’s only Ramsar Site.
  • The main sources of water of this lake are the Basistha and Kalamoni rivers.
  • The Beel drains into the Brahmaputra river.

Click here to know more about Deepor Beel.




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