“For the sake of confusion, let’s assume that instead of just “going dark”, the Sun ceases fusion in its core at midnight tonight. This will allow for any radiation emitted to make its way out and be emitted over the next several thousand years (since energy from fusion takes a considerable amount of time to be released from the Sun).
So when does it go dark? When and how does Earth cool off? Would all life die off, and if not, who would live/die? What kills off humans, the cold? A lack of oxygen? Something else?”
Click HERE to read a series of responses posted at Quora.