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What is a star?

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What is a star? Stars are huge balls of burning gas that are scattered throughout the Universe. They bum for millions of years, giving off both light and heat. Stars produce energy by a process called nuclear fusion. The coolest stars are red and dim, while the hottest stars give off blue-white light.
The temperatures on the surface range from 3,500C for cooler stars to over 40,000C for the hottest stars.

A new star is born when gas and dust are drawn together by gravity, forming a huge clump. It heats up until nuclear fusion begins, and the new star appears.


Tags: universe, gas, energy



Category: Astrology  - ( Astrology Archive)

Date Added: 09 December '11


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