4th Sep Current Affairs News Analysis | Prelims & Mains 2020

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Dear Aspirants
IASbhai Current Affairs News Analysis | Prelims & Mains 2020 is an initiative to dilute major articles from leading Newspapers in India which are most relevant to UPSC preparation –‘THE HINDU, LIVEMINT , INDIAN EXPRESS’ and help millions of readers who find difficulty in answer writing and making notes everyday. Hence we choose articles on daily basis and analyse them with respect to UPSC PRELIMS 2020.

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HIGHLIGHT INFO:

ORANGE COLOUR: Important for Prelims.

RED COLOUR: Important for Mains.

BLACK COLOUR: Must Read !

BLUE COLOUR : Important Links/Survey.

PINK COLOUR: Reports/Themes/Summits.

4th Sep Current Affairs News Analysis | Prelims & Mains 2020

Today's Must Read Articles : Today's Must Read Articles :

E 40 INLAND WATER PROJECT

ENHANCING NDC’s REPORT

Black holes

      HEADLINES:

Astronomers detect biggest collision of ‘impossible’ black holes

      WHY IN NEWS:

  • On May 21, 2019, a short gravitational wave signal came from two gigantic black holes weighing at least 85 and 66 times the mass of the sun.
  • On September 2, 2020, the astronomers declared it the biggest collision ever detected that led to the formation of a black hole 150 times the mass of the sun.
SYLLABUS COVERED: GS 3: Space

      ISSUE: 

The mammoth collision of two black holes formed another one 150 times the mass of the sun

4th Sep Current Affairs News Analysis

THE COLLISION

The collision was observed by – Laser Interferometer Gravitational-Wave Observatory (LIGO) and the European-based Virgo detector and VIRGO Scientific Collaboration.

According to astronomers,

  • Any black hole 65-130 the mass of the sun is ‘impossible’ to exist.
  • And any star big enough to create such a massive black hole should destroy itself upon collapse via a process called pair instability.

SO HOW DID THESE TWO BLACK HOLES COLLIDE?

  • Scientist think of black holes as the vacuum cleaners of the Universe.

They suck in everything in their paths, including gas clouds and stars .

  • The black holes also suck in other black holes.
  • This makes it possible to produce bigger and bigger black holes by the ongoing collisions of earlier generations of black holes.

MERGING BLACK HOLES

  • That is, astronomers believe the smaller black holes could have already been the products of previous mergers.

Black holes 100-100,000 times the mass of the sun are called intermediate mass black holes (IMBHs).

  • There have been no conclusive electromagnetic observations for IMBHs in the mass range 100-1,000 solar masses.
  • Analysis of the gravitational wave signal detected suggested the two black holes merged when the universe was seven billion years old, which is about half its current age.

      IASbhai WINDUP: 

  • The signal lasted only one-tenth of a second, but is the most distant gravitational wave signal detected so far.
  • Every observation about two black holes colliding gives us new and surprising information about the lives of black holes throughout the universe.
     SOURCES:DownToEarth | 4th Sep Current Affairs News Analysis

DISCOVER MORE : Important Daily Current Affairs for UPSC PRELIMS 2020

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