Stars-So Many Stars
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Stars are burring balls of gases in space. Made generally of hydrogen, they are undergoing nuclear fusion that produces all the other elements we find in the entire universe.
How do they form?
Gases that are floating freely in space are drawn together by gravity and once they become very dense they become very hot and ignite into a star.
How do they emit light?
The burning of gases inside stars produce electromagnetic energy (energy that travels through space as light rays)
How long do they burn for?
As long as there is fuel to burn, just like a wood fire or your cells burning oxygen, it runs out eventually and the star will come to the end of it's life cycle.
Are there different types of stars?
Yes, stars can come in many sizes and colour. The colour of a star is indicative of it's temperature and can be very hot (white or blue) to medium hot (yellow) to cool (red) This can also give us a clue to what types of elements are burning inside the star as different elements realise different colours of light when they burn.
How do stars die?
When a star runs out of hydrogen, it can end it's life in a few different ways depending on their size. Very big stars explode into novas and supernovas while medium stars "burnout" quietly and small stars eject their spent fuel into space. In all cases, the gases released will eventually lead to the formation of new stars.
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