what is a supernova?

Answer 1

A supernova is a stellar explosion which produces an extremely bright object made of plasma that declines to invisibility over weeks or months. A supernova releases more than about 1017 times the Sun's energy output, briefly outshining its entire host galaxy.

There are several different types of supernovae and two possible routes to their formation. A massive star may cease to generate fusion energy from fusing the nuclei 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 until it nears its Chandrasekhar limit and undergoes runaway nuclear fusion in its interior, completely disrupting it. Note that this second type of supernova should not be confused with a surface thermonuclear explosion on a white dwarf, which is called a nova. In either type of supernova, the resulting explosion expels much or all of the stellar material with great force.

The explosion drives a blast wave into the surrounding space, forming a supernova remnant. One example of this process is the remnant of SN 1604, shown to the right.

"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 this from an ordinary nova, which also involves a star increasing in brightness, though to a lesser extent and through a different mechanism. However, the name is inappropriate as it signals the end of a star (or at least its radical transformation into something else).

Answer 2

A supernova (pl. supernovae) is a stellar explosion which produces an extremely bright object made of plasma that declines to invisibility over weeks or months. A supernova releases more than about 1017 times the Sun's energy output, briefly outshining its entire host galaxy.

There are several different types of supernovae and two possible routes to their formation. A massive star may cease to generate fusion energy from fusing the nuclei 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 until it nears its Chandrasekhar limit and undergoes runaway nuclear fusion in its interior, completely disrupting it. Note that this second type of supernova should not be confused with a surface thermonuclear explosion on a white dwarf, which is called a nova. In either type of supernova, the resulting explosion expels much or all of the stellar material with great force.

The explosion drives a blast wave into the surrounding space, forming a supernova remnant. One example of this process is the remnant of SN 1604, shown to the right.

"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 this from an ordinary nova, which also involves a star increasing in brightness, though to a lesser extent and through a different mechanism. However, the name is inappropriate as it signals the end of a star (or at least its radical transformation into something else

Answer 3

A supernova is a stellar explosion which produces an extremely bright object made of plasma that declines to invisibility over weeks or months. A supernova releases more than about 1017 times the Sun's energy output, briefly outshining its entire host galaxy.

Answer 4

dear friend,

Supernova
One of the most energetic explosive events known is a supernova. These occur at the end of a star's lifetime, when its nuclear fuel is exhausted and it is no longer supported by the release of nuclear energy. If the star is particularly massive, then its core will collapse and in so doing will release a huge amount of energy. This will cause a blast wave that ejects the star's envelope into interstellar space. The result of the collapse may be, in some cases, a rapidly rotating neutron star that can be observed many years later as a radio pulsar.

have gr8 day

raj

Answer 5

A supernova (pl. supernovae) is a stellar explosion which produces an extremely bright object made of plasma that declines to invisibility over weeks or months.

Answer 6

Supernova is a stellar explosion, which produces an extremely bright object made of plasma that declines to invisibility over weeks or months.
It is the death stage of a star

Answer 7

Supernova is the final stage in the lives of those stars which have mass about 8 times that of sun. In it, there is a huge blast in which the whole star vapourises. It is the greatest type of bomb that can happen in nature.

Answer 8

A supernova is a star that explodes. the exploding star suddenly becomes very bright ,increasing its brightness to more than a billion times its original brightness and it slowly fades in a few weeks this explosion can be seen thru naked eye also!

Answer 9

Most of these answers are incorrect.

"Supernova" only describes the sudden increase in a star's brightness as it's dying when it expels its outer layers. It's really not all that complicated. It does not refer to the actual process of dying.

Answer 10

A supernova is a star explosion.