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A star is a giant ball of gas in space fuelled by
nuclear reactions in its core. You can see
several thousand stars on a clean night's sky.
The stars that the naked eye can see are only
the brightest stars. Astronomers have found
millions more stars by using powerful…

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All stars are born from clouds of dust, and end their lives in violent
circumstances. They begin life as dwarfs before changing into
giants or supergiants as they heat up. Depending on how much
mass they start out with, they end their lives in a variety of
different ways.

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The Death of a Supergiant
· Like a dwarf, a supergiant starts its life in the same way, but it is
much hotter and brighter and can be hundreds of times the
diameter of the Sun.
· After a brilliant but short life, a supergiant explodes itself . This

Page 4

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Stars operate on nuclear fusion. They operate on E=mc2, turning a
little bit of mass into a whole lot of energy.
How basic stars work:
Hydrogen (atomic weight 1.008) is pulled into the star by gravity.
Four hydrogen atoms get fused together to form one helium atom
(atomic weight 4.003).…


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