What is supernova?

  • (noun): A star that explodes and becomes extremely luminous in the process.

Supernova

A supernova (abbreviated SN, plural SNe after supernovae) is a stellar explosion that is more energetic than a nova. It is pronounced /ˌsuːpərˈnoʊvə/ with the plural supernovae /ˌsuːpərˈnoʊviː/ or supernovas. Supernovae are extremely luminous and cause a burst of radiation that often briefly outshines an entire galaxy, before fading from view over several weeks or months. During this short interval a supernova can radiate as much energy as the Sun is expected to emit over its entire life span. The explosion expels much or all of a star's material at a velocity of up to 30,000 km/s (10% of 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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Some articles on supernova:

List Of Supernovae - See Also
... Star portal History of supernova observation List of supernova remnants List of supernova candidates ...
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... Extreme (JP), Extreme (NA) Originally appeared in Beatmania IIDX 7th Style AA D.J.Amuro SuperNova, SuperNova (NA) Originally appeared in Beatmania IIDX 11 IIDXRED A Berry Happy Birthday ... Jimmy Weckl Extreme (JP), DS Fusion, SuperNova, SuperNova 2, X, X2 (Arcade) Originally appeared in DrumMania Africa True Kiss Destination True Kiss Destination Original artist ... MALAYA SuperNova 2 Originally by Diana Ross air DJ SIMON Extreme (JP), Extreme 2, Extreme Originally appeared in beatmania 6thMIX Akiba Drift Ko Kimura ...
Supernova - Milky Way Candidates
... and those in the Quintuplet Cluster, are also considered possible precursor stars to a supernova explosion in the 'near' future ... The nearest supernova candidate is IK Pegasi (HR 8210), located at a distance of 150 light-years ... before the white dwarf can accrete the critical mass required to become a Type Ia supernova ...
Supernova Impostor - Examples
... Possible examples of supernova impostors include the 1843 eruption of Eta Carinae, P Cygni, SN 1961V, SN 1954J, SN 1997bs, SN 2008S in NGC 6946, and SN 2010dn where detections ... One supernova impostor that made news after the fact was the one observed on October 20, 2004, in the galaxy UGC 4904 by Japanese amateur astronomer Koichi Itagaki ... This LBV star blew itself up just two years later, on October 11, 2006, as supernova SN 2006jc ...
Supernova Impostor
... Supernova impostors are stellar explosions that appear at first to be a type of supernova but do not destroy their progenitor stars ...