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Keywords:
Dwarf,
Brighten,
Suddenly,
Companion,
Thermonuclear
A star which suddenly increases in brightness thousands of times, then fades back to near its original intensity. It may appear as a "new" star if its original brightness was too low for routine observation. A star which suddenly increases in brightness to many millions of times its original intensity is a supernova, and the postulated mechanisms for the increases of brightness of novae and supernovae are different.
An extreme example of the cataclysmic variable phenomenon in which a star's brightness suddenly increases by a factor of a million and then fades over a period of weeks. Novae occur in binary systems of one normal and one white dwarf star, where the normal star transfers matter to the dwarf via an accretion disk. The accreted matter accumulates until such time that it spontaneously ignites in a thermonuclear outburst on the white dwarf's surface.
An explosive increase in stellar brightness by a factor of one hundred thousand to one million. Most novas occur in closely bound binary star systems, with one member being a white dwarf. The white dwarf pulls material (mostly hydrogen) that lies outside the companion star's Roche lobe. As hydrogen falls onto the white dwarf, the surface temperature and pressure increase until the hydrogen shell suddenly explodes in runaway thermonuclear reaction. Most of the material falls back onto the white dwarf. This is a recurring process that occurs as long as a steady stream of hydrogen flows to the white dwarf.
Star that suddenly erupts into an object of great brilliance, surpassing the Sun's luminosity by a factor of hundreds of thousands to millions of times and then fading more slowly.
A star which suddenly increases in brightness by a factor of more than hundred. Novae are close binary stars of which one component is a white dwarf star. Material from the companion star is transferred onto the white dwarf and triggers explosive nuclear reactions, resulting in the increased brightness.
see "supernova"
A star that suddenly increases in brightness. Most novae are thought to result in binary systems when matter from the giant component falls on the white dwarf component.
A star that explodes, temporarily increasing its brightness 100000 or more.
A Nova is a mixed unit of OmniMechs and Elementals and is commanded by a Star Commander or a Nova Commander. It usually consists of a Star of OmniMechs supported by a Star of Elementals.
A star that experiences a sudden outburst of radiant energy, temporarily increasing its luminosity by hundreds to thousands of times.
A faint star that suddenly becomes bright, becoming visible from where no star had been seen before. Only two or three novae are discovered each year. Most novae are binary stars.
a star that ejects some of its material in the form of a cloud and become more luminous in the process
a binary, or double, star in which one member is a white dwarf and the other is a giant or supergiant
a faint star that suddenly erupts in brightness
an enormous explosion at the surface of a star that is similar to a hydrogen bomb explosion, but much more powerful
an enormous nuclear explosion caused by the accretion of hydrogen onto the surface of a white dwarf star
a 'new star' -- a previously faint or invisible star which explodes, thus suddenly increasing in brightness
an explosion in a binary star system composed of a main-sequence star and a white dwarf
a star that suddenly becomes tens of thousands of times brighter in a matter of days, and then gradually fades
a star that suddenly brightens to many times the magnitude that it formerly was in a short period of time
a star that suddenly increases greatly in brightness and then slowly fades, but may continue to exist for some time
a star that suddenly increases greatly in brightness, then slowly fades back to its normal appearance over a period of months
a star that suddenly increases in brightness and then within a few months or years grows dim
a strong, rapid increase in the brightness of a star
a sudden increase in luminosity of a star, usually in the magnitide of thousands of times its original brightness
a sudden outburst of light coming from an old main-sequence star
a thermonuclear explosion that occurs on the surface of a white dwarf star in a double star system
a thermonuclear explosion triggered when mass is transferred from a star onto the surface of a white dwarf
a white dwarf (an old, shrunken star which has used up its nuclear fuel) which is in a close, mutual orbit with a larger star
( pl. novae) The sudden brightening of a white dwarf that is accreting hydrogen-rich matter from a nearby companion star. The brightening may be due to explosive hydrogen burning on the white dwarf's surface (called a classical nova) or the gravitational energy released during the crashing of matter from an accretion disk onto the white dwarf (dwarf nova).
These are a type of cataclysmic variable caused charactrised by a brightening of up to 10 magnitudes within several days. They are caused by a thermonuclear eplosion of material that has accreted onto a white dwarf in a close binary system. Unlike a supernova explosion the white dwarf remains after the explosion and can accrete more material from its companion so that the process is repeated after many thouands of years.
A break of red and blue stars followed by a ring of silver sparked reports.
a stellar explosion of a red giant star, ending in a planetary nebula and a white dwarf.
A star that suddenly flares in brightness by a factor of hundreds of thousands
A star that abruptly increases in brightness by a factor of a million. A nova is caused in a binary star system where hydrogen-rich material is transferred to the surface of a white dwarf until sufficient material and temperatures exist to kindle explosive nuclear fusion.
Nova simply means new, an apt name for stars which seem to suddenly to appear and then fade. In fact they are not new stars but phenomena which occur in binary systems and which are somewhat similar to type I supernovae white dwarf gains mass from its companion star. The layer of hydrogen and helium builds up until it reaches a temperature where fusion reactions can occur. The layer then burns off very quickly, because the layer does not expand with increasing temperature, due to degeneracy. This sudden flash is what can be observed.
A sudden stellar brightening. Novae occur in binary star systems involving a white dwarf and main sequence star. The white dwarf siphons hydrogen from the main sequence star. The hydrogen is compressed on the surface of the white dwarf until it detonates, producing a nova.
A star that brightens suddenly and to an unprecedented degree, creating the impression that a new star has appeared where none was before. Hence the name, from nova for "new."
An existing star which suddenly increases its brightness by more than 10 magnitudes and then slowly fades.
A star that flares up to several times its original brightness for some time before returning to its original state.
a violent explosion on the surface of a white dwarf, which causes the star to temporarily brighten by a factor of several hundred to several thousand.
a star that shows a sudden increase in luminosity, up to 100,000 times, in a time that can even be as short as a few hours. This phenomenon is caused by a violent expansion of the outer layers of the star.
(Latin, "new") A star that has a sudden outburst of energy, temporarily increasing its brightness by hundreds to thousands of times; now believed to be the outburst of a degenerate star in a binary system; also used in the past to refer to some stellar outbursts that modern astronomers now call supernovas.
A star which suddenly flares up to many times its original brightness before fading again.
an object that greatly increases in brightness rapidly, so it appears as a ``new star''. It is caused by the buildup on a white dwarf's surface of hydrogen gas from a companion star to the point where the hydrogen fuses explosively into helium. The super-rapid fusion does not blow up the white dwarf, so the process can repeat itself (contrast with a Type I supernova).
A star that suddenly increases in brightness, often by a factor of as much as 10,000, then slowly fades back to its original luminosity. A nova is the result of an explosion on the surface of a white dwarf star, caused by matter falling onto its surface from the atmosphere of a binary companion.
A star that rapidly brightens while expelling a small fraction of its matter, after which it slowly fades back to normal.
A binary star system (consisting of a white dwarf and a companion star) that rapidly brightens, then slowly fades back to normal.
The apparent 'brightening of a star' in the sky. This is caused by material drawn from a companion star igniting.
A star which suddenly becomes many times brighter than previously, and then gradually fades.
From the Latin, meaning "new", a sudden brightening of a star making it appear as a new star in the sky. Believed to be associated with eruptions on white dwarfs in binary systems.
A star that suddenly and temporarily increases its brightness to perhaps 100,000 times normal. There are a variety of mechanisms that cause this.
Literally new star; applied to stars that suddenly appear with great brilliance then fade; an exploding star.
A nova (pl. novae) is a cataclysmic nuclear explosion caused by the accretion of hydrogen onto the surface of a white dwarf star.
November Annabella "Nova" Terra is the code name of a Terran Ghost in the Blizzard Entertainment game, . Her early life is described in Star Craft_Ghost:_Nova.
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