Ok... Let's say there is a star with a planet orbiting it which supports life. If, somehow (never mind how), the star within an instant became massive beyond the Chan. Limit... 1) how long would it take to form a black hole (assuming that the mass kept increasing until it reached a black hole state, or, in other words, could this process be accelerated by the addition of more mass?), and 2) how would this affect the life on the planet orbiting the star? (or exactly how would they die and how long would that take?) thanks for any input.