In this video I describe the physics for star formation: how to turn a cloud of gas in interstellar space, into a nuclear reactor. I describe the upper and lower limits of masses needed to produce a star. A brown dwarf is a failed star, without enough mass to initiate hydrogen fusion in its core.
This video uses a clip from the following:
"A Star is Born | How the Universe Works" by Science Channel: https://www.youtube.com/watch?v=mkktE_fs4NA
