About how old is the sun? 1.2 billion years 4.6 billion years 6.4 billion years 8.2 billion years

4.6 billion years

Explanation:

The Sun is about 4.6 billion years old and would live for about 5 billion years more. The Sun was born in the Solar nebula 4.6 billion years ago. The molecular cloud of dust and gases accreted and collapsed and contracted under its own weight. The mass started spinning which eventually flattened into a disk. The core formed the Sun and from rest of the material, planets and other solar system bodies were formed.

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