Jayant Narlikar is an Indian astrophysicist and cosmologist who has made significant contributions to the study of galaxy interactions.

The Giant Metrewave Radio Telescope is a large radio telescope located in Pune, India. It is used to study a variety of astronomical objects, including galaxies and their interactions.

The Inter-University Centre for Astronomy and Astrophysics is a research institution located in Pune, India. It is known for its work on a variety of astronomical topics, including galaxy interactions.

Astrosat is an Indian satellite that is used to study a variety of astronomical objects, including galaxies and their interactions.

Subrahmanyan Chandrasekhar was an Indian astrophysicist who made significant contributions to the study of the evolution of galaxies.

The Himalayan Chandra Telescope is a large optical telescope located in Uttarakhand, India. It is used to study a variety of astronomical objects, including the cosmic microwave background.

The Indian Institute of Astrophysics is a research institution located in Bangalore, India. It is known for its work on a variety of astronomical topics, including the cosmic microwave background.

INSAT-3D is an Indian satellite that is used to study a variety of astronomical objects, including the cosmic microwave background.

Vikram Sarabhai was an Indian physicist who made significant contributions to the study of the formation of galaxies.

The Aryabhata Telescope is a small optical telescope located in Nainital, India. It is used to study a variety of astronomical objects, including the formation of galaxies.

The Tata Institute of Fundamental Research is a research institution located in Mumbai, India. It is known for its work on a variety of astronomical topics, including the formation of galaxies.

Chandrayaan-1 is an Indian satellite that was used to study a variety of astronomical objects, including the formation of galaxies.

Govind Swarup was an Indian radio astronomer who made significant contributions to the study of the structure of galaxies.

The Vainu Bappu Telescope is a large optical telescope located in Kavalur, India. It is used to study a variety of astronomical objects, including the structure of galaxies.

The Physical Research Laboratory is a research institution located in Ahmedabad, India. It is known for its work on a variety of astronomical topics, including the structure of galaxies.