Scientists Detect Biggest Ever Merger of Two Massive Black Holes | Current Affairs | Vision IAS
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    Scientists Detect Biggest Ever Merger of Two Massive Black Holes

    Posted 16 Jul 2025

    2 min read

    Detected by the LVK Network of observatories, involving LIGO detector in United States, Virgo in Italy and KAGRA in Japan

    Key Highlights of the Event

    • Event: The event, GW231123, occurred billions of years ago and was detected through Gravitational Waves (GW) from it. 
      • GW are 'ripples' in space-time caused by some of most violent and energetic processes in the Universe. 
      • Albert Einstein (in his General Theory of Relativity) predicted their existence in 1916. 
    • Heaviest Merger: Involved two black holes with masses of about 100 and 140 times the Sun merging to form a final black hole weighing ~225 solar masses. 

    About Black Holes

    • They are astronomical objects with a gravitational pull so strong that nothing, not even light, can escape it. 
    • Types
      • Stellar-mass : Around 20 times the Sun’s mass or more.
      • Intermediate-mass: Around one hundred to hundreds of thousands of times the Sun’s mass.
      • Supermassive: Hundreds of thousands to billions of times the Sun’s mass.

    Gravitational Wave Detection Network

    • Laser Interferometer Gravitational-wave Observatory-LIGO: Wholly supported by the U.S. National Science Foundation (NSF), world’s largest gravitational wave observatory. 
      • Currently, has two detectors in Hanford, Washington and Livingston Louisiana.
      • LIGO-India is to be developed in Hingoli, Maharashtra in collaboration with NSF. 
    • Virgo, in Pisa, Italy: Hosted by European Gravitational Observatory (EGO), a collaboration of Italy and France.
    • KAGRA, Japan: Located inside the Kamioka mine. 
    • Tags :
    • LIGO
    • Gravitational Waves
    • Black Holes
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