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Greetings! 
Top Physics and Astronomy Colleges in India:
Indian Institute of Technology (IIT) Bombay
IIT Bombay’s Department of Physics is one of the best in India. The premier institute bagged 34th rank in QS Asia University Rankings 2017. The Department of Physics at this premier institute undertakes path-breaking and innovative research in Physics. Be it Nano Science or High Energy Particle Physics research, it has been showing its dominance in the world.
IIT Madras
It is one of the reputed institutes in India, specifically for research. The premier institute carries out cutting-edge research.
IIT Delhi
It is one of the top technological colleges in the country, which bagged 41st rank in QS Asia University Rankings 2017. 
Delhi University
Department of Physics & Astrophysics at the University of Delhi offers a wide range of specializations with top-notch faculty in the country. In QS Asia University Rankings 2017, DU bagged 74thspot.
. Thankyou

Hi Muthu,

I am enlisting some of the best colleges for MSc. in Astro Physics:

Here are those:

• Osmania University, Hyderabad
• Andhra University college of Science and Technology, Visakhapatnam
• Punjabi University, Patiala, Punjab.
• National Centre for Radio Astrophysics
• IIA, Bangalore

Hope it helps..!!
Feel free to contact in case of any doubt.
Good Luck