How does a massive star go supernova? This video is a follow-up to the Khan Academy video on the life cycle of massive stars, explaining the chemical collapse that results in a supernova. Sal explains the process with neutron stars and...

Have all your supernova questions answered with this four and a half minute video clip. You'll discover that a supernova is really the death of an expanding star, that there are different types of supernovas, and what their effects are...

In need of clarification on the last Khan Academy video on supernova? A short video explains that while humans observed the event that became the Crab Nebula 1,000 years ago, the actual event occurred 7,500 years ago.