This time we are going on a journey to the most mysterious objects in the universe: black holes. Get your cup of tea and enjoy the ride!

Some useful links...

Escape velocity: https://en.wikipedia.org/wiki/Escape_....

Binary star systems: https://en.wikipedia.org/wiki/Binary_....

Dark stars: https://en.wikipedia.org/wiki/Dark_st....

Law of universal gravitation: https://en.wikipedia.org/wiki/Newton%....

Fundamental theorem of calculus: https://en.wikipedia.org/wiki/Fundame....

Needless to say how much I appreciate and find inspiration in the work of astrophysicist Dr Sergei Popov: https://scholar.google.com/citations?....