Super Nova

Super Nova

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.

Nova means "new" in Latin, referring to what appears to be a very bright new star shining in the celestial sphere; the prefix "super-" distinguishes supernovae from ordinary novae which are far less luminous. The word supernova was coined by Walter Baade and Fritz Zwicky in 1931. Supernovae can be triggered in one of two ways: (1)by the sudden reignition of nuclear fusion in a degenerate star; or (2)by the collapse of the core of a massive star. Regarding the first process, the core of an aging massive star may undergo sudden gravitational collapse, releasing gravitational potential energy that can create a supernova explosion. Regarding the second process, alternatively, a white dwarf star may accumulate sufficient material from a stellar companion (either through accretion or via a merger) to raise its core temperature enough to ignite carbon fusion, at which point it undergoes runaway nuclear fusion, completely disrupting it.

Although no supernova has been observed in the Milky Way since SN 1604, supernovae remnants indicate that on average the event occurs about three times every century in the Milky Way. They play a significant role in enriching the interstellar medium with higher mass elements. Furthermore, the expanding shock waves from supernova explosions can trigger the formation of new stars.

Read more about Super Nova:  Observation History, Discovery, Naming Convention, Classification, Current Models, Milky Way Candidates, See Also

Other articles related to "super nova, nova":

Andy Soucek - Career
... as a replacement for the injured Christian Bakkerud in the Super Nova team ... After two races with Super Nova, Soucek then returned to the DPR team where he replaced Giacomo Ricci, himself substituting for the injured Michael Herck ... Following his stint with DPR, Soucek returned once more to Super Nova as a permanent replacement for Bakkerud ...
Supernova (disambiguation) - In Other Uses
... a synthesizer by Novation Digital Music Systems Super Nova Racing, a Formula 3000, GP2 and A1 motor racing team 7712 Supernova, a new human battle machine in the Lego Exo-Force toy series ...
Super Nova - See Also
... Astronomy portal Star portal Space portal Champagne Supernova Dwarf nova Guest star (astronomy) List of supernovae List of supernova remnants Quark nova Supernovae in fiction Timeline of white ...
Super Nova Racing
... Super Nova Racing is a British racing team that has competed in Formula 3000/GP2 and the A1 Grand Prix series ... Super Nova first entered racing in 1991 ... Super Nova was a new incarnation of the pre-existing David Sears Motorsport, sponsored by the Nova chain of Japanese English schools and also ran the Danish Den Blå Avis outfit ...

Famous quotes containing the word nova:

    I’m a Nova Scotia bluenose. Since I was a baby, I’ve been watching men look at ships. It’s easy to tell the ones they like. You’re only waiting to get her into deep water, aren’t you—because she’s yours.
    John Rhodes Sturdy, Canadian screenwriter. Richard Rossen. Joyce Cartwright (Ella Raines)