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The Role of Indian Observatories in Black Hole Detection and Study

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Multiple Choice

Which Indian observatory played a crucial role in the detection of the first black hole candidate, Cygnus X-1, in 1971?

  1. Giant Metrewave Radio Telescope (GMRT)
  2. Udaipur Solar Observatory (USO)
  3. Vainu Bappu Observatory (VBO)
  4. Tata Institute of Fundamental Research (TIFR) Radio Astronomy Centre
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