S Kulkarni

 https://sites.astro.caltech.edu/~srk/

A great professor

Professor Stephen Hawking: Black Holes

 

https://www.bbc.co.uk/programmes/b06qrkn9/clips

Roger Penrose

 https://www.nobelprize.org/prizes/physics/2020/penrose/facts/

Andrea Ghez

 https://www.ted.com/talks/andrea_ghez_the_hunt_for_a_supermassive_black_hole

Nobel Prize 2020

https://www.nobelprize.org/prizes/physics/2020/ghez/facts/

http://www.astro.ucla.edu/~ghez/