- Mars is often referred to as the red planet because its surface is red due to iron oxide, or rust.
- The average lifespan of a star is 10 billion years.
- All the other planets in our solar system could fit between Earth and its moon.

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- Mars is often referred to as the red planet because its surface is red due to iron oxide, or rust.
- The average lifespan of a star is 10 billion years.
- All the other planets in our solar system could fit between Earth and its moon.
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