The correct formula is Rs = 2MG/c^2

This means that the critical radius R (subscript) s is equal to twice the mass times G the gravitational constant (6.67x10^-8 dyne centimeteres squared divided by the acceleration due to gravity on the earth) divided by c the speed of light (in centimeteres per second) squared.

For a mass approximately equal to the masss of the sun 2x10^33 grams

This radius is about 3km and is sometimes called the Schwarzchild radius

so if you can take the sun which has a radius of about 700,000 km and squash it into a radius if 3km you will have made a black hole

Learn, create, test and tell

evolution rules in all things

God says so!