Identify this teacher-assistant pair who are well known for their contribution to astronomy.

Hint: Let’s call the guy to the right 1 and the one to the left 2. 2 was 1’s assistant and after 1 died, 2 used data collected by 1 and derived some very important stuff in astronomy.

Cracked by: Poornima , madhur , bobo , nishansolo , duriel , shenoyvarun86 , Tathagata Chatterjee , teju , varuns88 , quantumfoammakesmeroamakhi , Dibyo , Srikanth , shashank , Arun Warrier , yaksha and Shreyas.

Poornima, madhur, bobo, nishansolo, duriel, shenoyvarun86, Tathagata Chatterjee, teju, varuns88, akhi, Dibyo, Srikanth, shashank, Arun Warrier, yaksha and Shreyas