Scientists think that the Sun started from a very large cloud of dust and small bits of ice 4.6 billion years ago. At the center of that huge cloud, some of the material started to build up into a ball called the Sun. Once this Sun got big enough, fusion reactions inside it caused that ball make heat and for it to shine.
The light that was made from fusion in the Sun pushed away all the rest of the cloud from itself, and the planets formed from the rest of this cloud.
The light that was made from fusion in the Sun pushed away all the rest of the cloud from itself, and the planets formed from the rest of this cloud.
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