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What Is a Supernova?
A supernova is a rare, extremely bright exploding star. It suddenly becomes at least a billion times brighter than it was previously. Then it fades away. At its peak, it can outshine a galaxy. Its explosion propels a cloud of gas and dust into space.... More »
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A supernova is a transient astronomical event that occurs during the last stellar evolutionary stages of a massive star's life, whose dramatic and catastrophic ...


Sep 4, 2013 ... A supernova is the explosion of a star -- the largest explosion that takes place in space.


Aug 15, 2017 ... A supernova is the biggest explosion that humans have ever seen. Each blast is the extremely bright, super-powerful explosion of a star.


Jan 27, 2014 ... This Chandra X-ray photograph shows Cassiopeia A (Cas A, for short), the youngest supernova remnant in the Milky Way.


This 1991 image shows a small portion of the Cygnus Loop supernova remnant. The formation shown here marks the outer edge of an expanding blast wave ...

Dec 21, 2012 ... Science expert Emerald Robinson explains what a supernova is.To view over 15000 other how-to, DIY, and advice videos on any topic, visit ...


Every now and again our Milky Way galaxy is lit up by a huge explosion. Known as a supernova, this violent event marks the death of a supergiant – a ...


Supernovae (the plural of supernova) can become billions of times brighter than the Sun. A supernova explosion releases billions of tiny particles called atoms ...


A supernova happens where there is a change in the core, or center, of a star. A change can occur in two different ways, with both resulting in a supernova.