Supernova

=**Supernova**=

A supernova is an exploding star that can become billions of times as bright as the sun before disappearing from view. At its maximum brightness, the exploded star may outshine an entire galaxy. The explosion throws a large cloud of dust and gas into space. The mass of the expelled material may exceed 10 times the mass of the sun.

One of the most strong explostion is a supernova. These happen 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 big, then its core will collapse and in so doing will release a very big 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 turning neutron star that can be observed many years later as a radio pulsar.

There are two types of supernovae type and type two. Type I supernovae probably occur in certain binary stars. A binary star is a pair of stars that are close together and orbit each other.Type one mostly happens in binaries in which one of the stars is a small, dense star called a white dwarf. If the two stars are close enough to each other, the gravitational pull of the white dwarf absorb mass from the larger companion. When the white dwarf reaches a mass about 1.4 times that of the sun, it will explodes. Type II supernova results from the death of a single star much more massive than the sun. When such a star begins to burn out, its core quickly collapses. Tremendous energy is released in the form of neutrinos .This energy causes the star to explode into a supernova.

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