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Supernova
Part 1 of Paper
....ithin 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 explosions are recorded in history: in 1054, in
1572, and in 1604. The CRAB NEBULA consists of material ejected by the
sup.... Part 2 of Paper
....n 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 occurs among old stars of small mass, whereas type II occurs among
very young stars of large mass. It is not known how a small-mass star can
release the very large amounts of energy needed to explain type I
supernovas. Scientists generally believe that this must involve binary
systems--two stars revolving around eac.... |
| Number of words: 696 - Approximate pages: 3 |
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