Supernova
Beginning of paper
A is a STAR that explodes. It suddenly increases in
brightness by a factor of many billions, and within a few weeks it slowly
fades. In terms of the human lifespan, such explosions are rare occurrences.
In our Milky Way galaxy, for example, a may be observed every few
hundred years. Three such ex ....
Middle of paper
.... energy in a few days than the Sun does in
100 million years, and the energy expended in ejecting material is much
greater even than this. In many cases, including the Crab nebula supernova,
the stellar remnant left behind after the explosion is a NEUTRON STAR--a
star only a few kilometers in diameter having an enormously large density
and consisting mainly of neutrons--or a PULSAR, a pulsating neutron star.
There are two common types of supernovas, called type I and type II.
Type I oc ....
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Page count: 3 (approximately 250 words per page)
