What is a Supernova?

Answer

rloaks
A nova happens when a star runs out of energy and collapses in on itself. A supernova what happens when the gravitational pull of the star's core causes it to collapse so quickly and catastrophically that in implodes, then explodes. Supernovas often form black holes. You can find more information here: http://imagine.gsfc.nasa.gov/docs/science/know_l2/supernovae.html
Ask.com Answer for: what is a supernova
A supernova is the explosion of a massive star. Supernovae are extremely bright and create a huge burst of radiation.
Supernovae occur either when the mass of a star's core exceeds the sustainable limit or when nuclear fusion produces more energy than the star can contain. More >>
1 Additional Answer
tootee70
A supernova is a star that explodes. The explosion can be billions of times as bright as the sun, before it gradually fades from view. It may take a few years to finally fade. You can find more information here: http://www.nasa.gov/worldbook/supernova_worldbook.html
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A supernova looks like very huge explosion. The radiation light that it has after the explosion can remain for weeks or even months! Now, that is something to see.
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