The Giant Metrewave Radio Telescope (GMRT) is located near Pune, Maharashtra, and is known for its discovery of the first extragalactic radio source, Cygnus A, in 1946.

The Ooty Radio Telescope (ORT) is located in Ooty, Tamil Nadu, and is known for its discovery of the first pulsar, PSR B1919+21, in 1967.

The Vainu Bappu Observatory (VBO) is located in Kavalur, Tamil Nadu, and was involved in the discovery of the first X-ray binary star, Sco X-1, in 1962.

The Laser Interferometer Gravitational-Wave Observatory (LIGO) is a joint project between the United States and India, and it made the first detection of gravitational waves in 2015.

The Udaipur Solar Observatory (USO) is located in Udaipur, Rajasthan, and is known for its discovery of the first optical counterpart of a gamma-ray burst, GRB 080319B, in 2008.

The Vainu Bappu Observatory (VBO) is located in Kavalur, Tamil Nadu, and is known for its discovery of the first extrasolar planet orbiting a Sun-like star, 51 Pegasi b, in 1995.

The Aryabhata Research Institute of Observational Sciences (ARIES) is located in Nainital, Uttarakhand, and was involved in the discovery of the first brown dwarf, Teide 1, in 1995.

The Udaipur Solar Observatory (USO) is located in Udaipur, Rajasthan, and is known for its first detection of a black hole candidate, Cygnus X-1, in 1971.

The Vainu Bappu Observatory (VBO) is located in Kavalur, Tamil Nadu, and was involved in the discovery of the first quasar, 3C 273, in 1963.

The Giant Metrewave Radio Telescope (GMRT) is located near Pune, Maharashtra, and is known for its discovery of the first radio galaxy, Cygnus A, in 1946.

The Aryabhata Research Institute of Observational Sciences (ARIES) is located in Nainital, Uttarakhand, and was involved in the discovery of the first supernova remnant, Cassiopeia A, in 1979.

The Udaipur Solar Observatory (USO) is located in Udaipur, Rajasthan, and is known for its first detection of a gamma-ray burst, GRB 970228, in 1997.

The Vainu Bappu Observatory (VBO) is located in Kavalur, Tamil Nadu, and was involved in the discovery of the first extragalactic planetary nebula, NGC 2392, in 1964.

The Vainu Bappu Observatory (VBO) is located in Kavalur, Tamil Nadu, and is known for its discovery of the first double quasar, Q0957+561 A and B, in 1979.

The Aryabhata Research Institute of Observational Sciences (ARIES) is located in Nainital, Uttarakhand, and was involved in the discovery of the first gravitational lens, Q0957+561, in 1979.