Sun
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Astronomy - Sun

The Sun: Classroom Facts and Activity

The Sun is the closest star to Earth. Learn more about astronomy terms with our picture encyclopedia!




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Storyboard Description

The Sun is the average star about on the Orion Arm of the Milky Way galaxy and the closest star to Earth. It is a main sequence star roughly halfway through its lifetime. Its mass provides over 99% of the total mass of the Solar System.

Storyboard Text

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  • SUNThe Sun is the average star about on the Orion Arm of the Milky Way galaxy and the closest star to Earth. It is a main sequence star roughly halfway through its lifetime. Its mass provides over 99% of the total mass of the Solar System.