Well I was going to send you lots of links about supernova, but nothing is better than a NASA link: [link]
Just see over there: A supernova occurs when a very large star uses up all its fuel and suddenly blows off most of its matter, radiating more energy than a billion suns. The supernova remnant (SNR), the expelled matter from the explosion, can be seen for thousands of years as the afterglow.
Planet involved?? Humm where??