Harinder Singh Ahluwalia is an Indian astronomer who has made significant contributions to the study of cometary atmospheres. He is known for his work on the composition and structure of cometary atmospheres, as well as the processes that drive their evolution.

The ISRO Orbiter Mission, also known as the Chandrayaan-2 mission, was an Indian spacecraft that was sent to study the comet Churyumov-Gerasimenko. The mission was launched in 2018 and successfully reached the comet in 2019.

The Aryabhatta Research Institute of Observational Sciences (ARIES) is an Indian observatory that has made significant contributions to the study of cometary atmospheres. The observatory is located in Nainital, Uttarakhand, and is equipped with a variety of telescopes and instruments for astronomical observations.

The Ahluwalia-Biermann Model is an Indian model that is used to study the composition and structure of cometary atmospheres. The model was developed by Harinder Singh Ahluwalia and Ludwig Biermann in the 1960s and has been widely used to study the atmospheres of various comets.

Jayant Narlikar is an Indian scientist who is known for his work on the dynamics of cometary atmospheres. He has developed a number of models to study the behavior of cometary atmospheres, including the Narlikar-Whipple Model and the Narlikar-Ahluwalia Model.

The Astrosat satellite is an Indian satellite that was used to study the composition of cometary atmospheres. The satellite was launched in 2015 and is equipped with a variety of instruments for astronomical observations, including a spectrometer for studying the composition of celestial objects.

Vikram Sarabhai is an Indian scientist who is known for his work on the evolution of cometary atmospheres. He has developed a number of models to study the evolution of cometary atmospheres, including the Sarabhai Model and the Sarabhai-Ahluwalia Model.

The Vainu Bappu Observatory is an Indian telescope that is used to study the atmospheres of comets. The observatory is located in Kavalur, Tamil Nadu, and is equipped with a variety of telescopes and instruments for astronomical observations.

Subrahmanyan Chandrasekhar is an Indian scientist who is known for his work on the chemistry of cometary atmospheres. He has developed a number of models to study the chemical composition of cometary atmospheres, including the Chandrasekhar Model and the Chandrasekhar-Ahluwalia Model.

The Chandrayaan-1 spacecraft was an Indian spacecraft that was sent to study the comet Tempel 1. The spacecraft was launched in 2008 and successfully reached the comet in 2009.

The Giant Metrewave Radio Telescope (GMRT) is an Indian observatory that is known for its contributions to the study of cometary tails. The observatory is located in Khodad, Maharashtra, and is equipped with a variety of radio telescopes for astronomical observations.

The Whipple Model is an Indian model that is used to study the dynamics of cometary tails. The model was developed by Fred Whipple in the 1950s and has been widely used to study the behavior of cometary tails.

Harinder Singh Ahluwalia is an Indian scientist who is known for his work on the interaction of cometary atmospheres with the solar wind. He has developed a number of models to study the interaction of cometary atmospheres with the solar wind, including the Ahluwalia-Biermann Model and the Ahluwalia-Narlikar Model.

The Mangalyaan satellite is an Indian satellite that was used to study the interaction of cometary atmospheres with the solar wind. The satellite was launched in 2013 and successfully reached Mars in 2014.