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supernova
n. (Astronomy) extremely bright star that has exploded due to gravitational collapse of the star's core (characterized by brightness that is up to 100 million times that of the Sun)

produced in the Big Bang, as well as heavier elements ejected by supernovas.[4] About 4.6 billion years ago, the solar nebula began to contract, possibly due
produced in the Big Bang, as well as heavier elements ejected by supernovas.[4] About 4.6 billion years ago, the solar nebula began to contract, possibly due

Super Nova
The term Super Nova has a variety of uses. It may refer to:


Scientific
A Supernova may refer to several types of stellar explosions that produce extremely bright objects made of plasma that decline to invisibility over weeks or months.Earth may have been formed by explosion of one of the supernovas some 5 billion years ago

Supernova
A supernova (plural: supernovae or supernovas) is a stellar explosion that creates an extremely luminous object. A supernova causes a burst of radiation that may briefly outshine its entire host galaxy before fading from view over several weeks or months. During this short interval, a supernova can radiate as much energy as the Sun would emit over 10 billion years. The explosion expels much or all of a star's material at a velocity of up to a tenth the speed of light, driving a shock wave into the surrounding interstellar medium. This shock wave sweeps up an expanding shell of gas and dust called a
supernova remnant.

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Noun
1. a star that explodes and becomes extremely luminous in the process
(hypernym) star
(hyponym) Crab Nebula
supernova[ˌsu:pə'nəʊvə]
■ noun (plural supernovae -vi: or supernovas) Astronomy a star that undergoes a catastrophic explosion, becoming suddenly very much brighter.



© Oxford University Press, 2004



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supernova
(نجوم) ستاره داراي نور متغيري که روشني اش صد ميليون برابر خورشيد است ، ابرنواختران