UM-DAE CBSis an ipso facto autonomous institute founded and funded by the Department of Atomic Energy, and housed by the University of Mumbai. CBS functions in afirst-of-its-kind unique collaborative model , primarily seeking tounite fundamental research and educationinto a common framework. The process starts right from the undergraduate stage itself.

Something more

Student faculty ratio. The very limited and selective intake by CBS means that a student can get more personal hours of interaction with a teacher, which is utmost importance for academic excellence.

Proximity to nearby institutions:In addition to CBS, Mumbai is home to other institutes of science and research like :

TIFR(Tata institute of Fundamental Research)

HBCSE (Homi Bhabha Centre for Science Education)

BARC (Bhabha Atomic Research Centre)

IIT-B (Indian Institute of Technology)

etc. Etc.

Hi Aspirant

Your question is a little ambiguous as you it incomplete since you have not mentioned all the details, so I cannot seem to understand what information you are exactly trying to look for.

You have not mentioned any particular course or subject. Without knowing these details answering this question is impossible. 

Mention these details in the comments section below and I will try to help you out.