Jayant Narlikar is a renowned Indian astronomer and cosmologist who has made significant contributions to the study of the Large-Scale Structure of the Universe.

Fred Hoyle, an Indian-born British astronomer, was a strong advocate of the Steady State Theory, which proposed that the Universe is continuously expanding and creating new matter.

Subrahmanyan Chandrasekhar, a Nobel laureate, made significant contributions to the theory of Stellar Evolution, including the Chandrasekhar Limit, which determines the fate of massive stars.

Subrahmanyan Chandrasekhar's research on Black Holes led to the development of the Chandrasekhar Limit, which determines the critical mass above which a star collapses into a Black Hole.

Vikram Sarabhai, a visionary scientist and administrator, was instrumental in establishing the Indian Institute of Astrophysics (IIA), a leading research center in astronomy and astrophysics.

Pramod Kale, an Indian astrophysicist, has made significant contributions to the study of the Cosmic Microwave Background Radiation (CMB), providing insights into the early Universe.

Subrahmanyan Chandrasekhar's work on Gravitational Collapse led to the development of the Chandrasekhar Limit, which determines the critical mass above which a star collapses under its own gravity.

Govind Swarup, an Indian radio astronomer, made significant contributions to the field of Radio Astronomy, including the development of the Giant Metrewave Radio Telescope (GMRT).

Dipankar Bhattacharya, an Indian astrophysicist, is known for his work on Accretion Disks, which are crucial in understanding the behavior of compact objects like Black Holes and Neutron Stars.

Rashmi Sharma, an Indian astrophysicist, has made significant contributions to the study of Dark Matter, including the detection of Dark Matter halos around galaxies.

Arvind Paranjpye, an Indian astrophysicist, is known for his work on Stellar Pulsations, which provides insights into the internal structure and evolution of stars.

Biman Nath, an Indian astrophysicist, made significant contributions to the field of X-ray Astronomy, including the development of X-ray telescopes and the study of X-ray sources.

T. Padmanabhan, an Indian astrophysicist, is known for his work on Supernovae, including the development of theoretical models for Supernova explosions.

Sanjeev Dhurandhar, an Indian physicist, has made significant contributions to the study of Gravitational Waves, including the development of instruments for detecting these waves.

Amitabha Lahiri, an Indian cosmologist, is known for his work on Cosmic Strings, which are hypothetical one-dimensional objects that may have formed during the early Universe.