Question

if u go outer space shouldn't you not see anything because it black and when you look back why is there a glow on and around the earth and how was black hold created and how did they study that black hold will kill you when suck in did they had a human or a living thing to test there theory

Answer 1

Answer:

Unfortunately, this temperature is on the order of billionths of a kelvin for black holes of stellar mass, making it essentially impossible to observe directly. Objects whose gravitational fields are too strong for light to escape were first considered in the 18th century by John Michell and Pierre-Simon Laplace.