what is supernova?

Answer 1

A supernova is a stellar explosion that creates an extremely luminous object that is initially made of plasma. In other words, a super Nova is a giant explosion that occurs when a planet explodes. Super Nova lasts for more then two weeks. Its more then the energy that sun gives out in billion years. One second of suns energy collected can power Earth for a year. So 60*60*24*12*365.25*1000000000= 378691200000000000

So one single supernova can supply earth for 3.7 gazillion years or you can just say 378691200000000000 years =).

Supernova can be felt throughout the whole galaxy since the shock wave moves ten times faster then the speed of light.

There are several types of supernovae and at least two possible routes to their formation. A massive star may cease to generate energy from the nuclear fusion of atoms in its core, and collapse under the force of its own gravity to form a neutron star or black hole. Alternatively, a white dwarf star may accumulate material from a companion star (either through accretion or a collision) until it nears the Chandrasekhar limit of roughly 1.44 times the mass of the Sun, at which point it undergoes runaway nuclear fusion in its interior, completely disrupting the star. This second type of supernova is distinct from a surface thermonuclear explosion on a white dwarf, which is called a nova. Solitary stars with a mass below approximately 8 solar masses, such as the Sun itself, evolve into white dwarfs without ever becoming supernovae. Some astronomers speculated that the explosive energy comes from gravity. Their idea was that a normal star implodes until its core reaches the density of an atomic nucleus. The collapsing material releases enough gravitational potential energy to blow the rest of the star apart.


I know more about supernovas so if you need more information, mail me at [e-mail]

Hope this helps!

~James

Answer 2

A supernova (plural: supernovae or supernovas) is a stellar explosion that creates an extremely luminous object that is initially made of plasma—an ionized form of matter. A supernova may briefly out-shine its entire host galaxy before fading from view over several weeks or months. During this brief period of time, the supernova radiates as much energy as the Sun would emit over about 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 gas. This shock wave sweeps up an expanding shell of gas and dust called a supernova remnant.

There are several types of supernovae and at least two possible routes to their formation. A massive star may cease to generate energy from the nuclear fusion of atoms in its core, and collapse under the force of its own gravity to form a neutron star or black hole. Alternatively, a white dwarf star may accumulate material from a companion star (either through accretion or a collision) until it nears the Chandrasekhar limit of roughly 1.44 times the mass of the Sun, at which point it undergoes runaway nuclear fusion in its interior, completely disrupting the star. This second type of supernova is distinct from a surface thermonuclear explosion on a white dwarf, which is called a nova. Solitary stars with a mass below approximately 8 solar masses, such as the Sun itself, evolve into white dwarfs without ever becoming supernovae.

On average, supernovae occur about once every 50 years in a galaxy the size of the Milky Way and play a significant role in enriching the interstellar medium with heavy elements. Furthermore, the expanding shock waves from supernova explosions can trigger the formation of new stars.

"Nova" is Latin for "new", 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 also involve a star increasing in brightness, though to a lesser extent and through a different mechanism.

Answer 3

When a giant star reaches the end of it's fuel supply radiation's outward push against the gravity of the star's mass falls rapidly, the remaining mass of the star collapses at close to the speed of light, as the mass reaches a critical point there is a great rebound caused by the unrelenting resistence of further compression and the outer layers of the star are blasted off in a huge explosion which can be brighter than the combined brightness of all the other stars in the galaxy, this material is recycled into other other stars as heavy elements that can not be produced by any star in the fusion process. The part of the star that is left becomes a small blck hole or a neutron star.

Answer 4

Supernovae are immense explosions that occur when a massive star (a supergiant) runs out of fuel and therefore can no longer hold its layers in place. These layers then collapse in on the star under gravity from the core; this results in a violent explosion.

Answer 5

Some stars can reach a stage in their lives that can result in spectacular, incredibly bright explosions. Astronomers realized that they briefly outshine billions of ordinary stars and must therefore be spectacular explosions.

In 1934 Fritz Zwicky of the California Institute of Technology coined the name "supernovae" for them. Supernovae play a special role in the universe and in the work of astronomers: seeding space with heavy elements, regulating galaxy formation and evolution, even serving as markers of cosmic expansion.

Some astronomers speculated that the explosive energy comes from gravity. Their idea was that a normal star implodes until its core reaches the density of an atomic nucleus. The collapsing material releases enough gravitational potential energy to blow the rest of the star apart.

An alternative emerged when other astronomers conceived of the explosions as giant nuclear bombs. When a sunlike star exhausts its hydrogen fuel and then its helium, it turns to its carbon and oxygen. Not only can the fusion of these elements release a titanic pulse of energy, it produces radioactive nickel 56, whose gradual decay would account for the months-long after-glow of the initial explosion.

Both these ideas have proved to be right. Of the supernovae that show no signs of hydrogen in their spectra (designated type I), most (type Ia) appear to be thermonuclear explosions, and the rest (types Ib and Ic) result from the collapse of stars that had shed their outer hydrogen layers. Supernovae whose spectra include hydrogen (type II) are thought to arise from collapse as well. Both mechanisms reduce an entire star to a shell of gaseous debris, and gravitational collapse events also leave behind a hyper-dense neutron star or, in extreme cases, a black hole.

Answer 6

A supernova is a giant explosion which radiates an insurmountable amount of energy. This explosion is the result of a star collapsing under it's own gravity. The gravitaional pull is so high that the star collapses.

Answer 7

A supernova is the remnants of an exploded star.

Answer 8

Supernova is a explosion of star that lost their energy.
Likes our sun is exactly a star. When it lost their energy it will be destroy and then a supernova will happen.

Answer 9

here is what's so cool approximately Genesis. It became written long before guy had a scientific expertise of the universe. however the sequence of events as reported by making use of Genesis and technology is an identical. as an occasion, the two Genesis and technology place here events in an identical order: introduction of light (the great bang), the introduction of our solar, the introduction of plant life, introduction of sea animials, introduction of land animals, introduction of guy. I purely are not getting why greater human beings do not comprehend that technology and Genesis the two prepare us appropriate to the origins of life, purely from a various perspective. i will purely think of that too a lot of human beings get hung up on the assumption of the 7 'days' of introduction being 7 24-hour classes. that's logically ludicrous. For starters, a famous 'day' is defined through fact the time it takes to have the earth rotate as quickly as. So how are you able to diploma days before the earth is created? next, Genesis form of pauses between each and every 'day' to allow for night to return accompanied by making use of morning. The 'project' is that that's continuously moring, midday, night, and night all on an identical time someplace on the earth. So how are you able to talk appropriate to the introduction of the earth in terms of the days being seperated by making use of night and morning? with the point to me, Genesis can't be taken litterally through fact it logically does not greater healthful jointly. yet here is what I do see. Genesis being written by making use of a guy (that did not understand the worldwide became around) constrained to his expertise of the organic worldwide. yet devinely inspired through fact various Genesis and technology parallel one yet another.

Answer 10

I'm not in the mood to answer questions.
Read about it here:
http://en.wikipedia.org/wiki/Supernovae