(Askeri) NOVA: Parlaklığında ani ve çok yüksek artış görülen yıldız. Samanyolunda her yıl buna benzer yirmi beş yıldız görülmektedir.. Enerjisinin büyük kısmının uzayda serbest bırakarak infilak eden bir yıldıza (supernova) denir
NOVA: Parlaklığında ani ve çok yüksek artış görülen yıldız. Samanyolunda her yıl buna benzer yirmi beş yıldız görülmektedir. Enerjisinin büyük kısmının uzayda serbest bırakarak infilak eden bir yıldıza (süpernova) denir
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 that abruptly and temporarily increases its brightness by a factor of hundreds of thousands Unlike supernovae (much more violent explosions which destroy the stars that produce them), stars that "go nova'' can do so more than once Novae are thought to occur in binary stars in which one member is a compressed dwarf star (such as a white dwarf or a neutron star) orbiting close to a much larger star According to this theory, material from the larger star's outer layers accumulates on the dwarf's surface, becoming ever hotter and more compressed by the dwarf's strong gravity, until the ~stolen'' material explodes [See supernova, binary star, white dwarf, and neutron star]
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 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
A "new" star or a very old dying star A sudden brightening of a star making it appear "new" in the sky; believed associated with eruptions on white dwarfs in binary systems Observations can help us understand what a nova is
A type of suddenly brightening star (from the Latin for ``new'') resulting from explosive brightening when gas is dumped from one member of a binary star pair onto the other
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
novas novae a star which explodes and suddenly becomes much brighter for a short time supernova. Any of a class of stars whose luminosity temporarily increases by several thousand up to a million times normal. Most appear to be close binary stars, one of which is a white dwarf star drawing in matter from the other until it becomes unstable, causing an outburst in which the outer layer of material is shed. A nova reaches maximum luminosity within hours after its outburst and may shine intensely for several days or even a few weeks; it then slowly returns to its former level. The process can repeat at intervals ranging from a few dozen to hundreds of thousands of years. Stars that become novas are usually too faint to see with the unaided eye until their sudden increase in luminosity, sometimes great enough to make them readily visible in the night sky. To observers, such objects may appear to be new stars; hence their name (Latin for "new"). See also supernova