Black Holes and Gravitational Waves 

to be honest that's really worth of 2 hours i get to learn so much thank you so much Dr frank .

Really an amazing presentation, especially I was surprised to see how the stellar mass black hole merged with the supermassive black hole. The entire video is worth watching.

OMG that simulation of a stellar mass black hole in-spiraling to a super massive black hole is just AMAZING!!! I can't wait for the space based LIGO! Great Talk.

Excellent lectures.

excellent !

Thank you for a very intriguing presentation.

In the STSCI playlist, the Astronomer's Toolkit video was uploaded a second time, not this one.

Rocked it at the end.

Bob lazar