The Himalayan Chandra Telescope (HCT) is the largest and most advanced optical telescope in India, located at an altitude of 4,500 meters in the Himalayas.

The Giant Metrewave Radio Telescope (GMRT) is located near Pune, Maharashtra, and is one of the world's largest radio telescopes.

The Udaipur Solar Observatory (USO) is dedicated to the study of cosmic rays and is located in Udaipur, Rajasthan.

The Aryabhatta Research Institute of Observational Sciences (ARIES) is located in Nainital, Uttarakhand, and is known for its research in astronomy and astrophysics.

The Vainu Bappu Observatory (VBO) is known for its research in solar physics and is located in Kavalur, Tamil Nadu.

The Indian Institute of Astrophysics (IIA) is located in Bangalore, Karnataka, and is a leading research institute in astronomy and astrophysics.

The Infrared Telescope Facility (IRTF) is known for its research in infrared astronomy and is located on Mauna Kea, Hawaii, but is operated by the Indian Institute of Astrophysics (IIA).

The National Centre for Radio Astrophysics (NCRA) is located in Pune, Maharashtra, and is a leading research institute in radio astronomy.

The Major Atmospheric Gamma-ray Imaging Cherenkov Telescope (MAGIC) is known for its research in gamma-ray astronomy and is located on the Canary Islands, Spain, but is operated by an international collaboration including Indian scientists.

The Tata Institute of Fundamental Research (TIFR) is located in Mumbai, Maharashtra, and is a leading research institute in fundamental science, including astronomy and astrophysics.

AstroSat is India's first dedicated X-ray astronomy satellite and is known for its research in X-ray astronomy.

The Indian Astronomical Observatory (IAO) is located in Hanle, Ladakh, Jammu and Kashmir, and is known for its high-altitude observations.

The India-based Neutrino Observatory (INO) is known for its research in neutrino astronomy and is located in Theni, Tamil Nadu.

The Vainu Bappu Observatory (VBO) is located in Kavalur, Tamil Nadu, and is known for its research in solar physics.

The Laser Interferometer Gravitational-Wave Observatory (LIGO) is known for its research in gravitational wave astronomy and has observatories in the United States, but Indian scientists are involved in the collaboration.