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en.wikipedia.org/wiki/Supernova

A supernova/ˌsuːpərnoʊvə/ plural: supernovae /ˌsuːpərnoʊviː/ or supernovas, abbreviations: SN and SNe) is an astronomical event that occurs during the ...

www.nasa.gov/audience/forstudents/5-8/features/nasa-knows/what-is-a-supernova.html

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

spaceplace.nasa.gov/supernova/en

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.

www.space.com/6638-supernova.html

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

www.nationalgeographic.com/science/space/universe/supernovae

When supernovae explode, they jettison matter into space at some 9,000 to 25,000 miles (15,000 to 40,000 kilometers) per second. These blasts produce much ...

www.esa.int/esaKIDSen/SEMBG13VRRE_OurUniverse_0.html

Aug 9, 2017 ... 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 ...

www.ask.com/youtube?q=What+Is+a+Supernova%3F&v=QfNqBKAvkpw
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 ...

science.howstuffworks.com/supernova.htm

A supernova occurs when a dying star explodes. Learn how a supernova works at HowStuffWorks.

hubblesite.org/reference_desk/faq/answer.php.id=30&cat=stars

A supernova is the explosive death of a star, which unleashes a burst of light through the cosmos. Supernovas happen in two different ways: When massive stars ...