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Why is Mars red?

Mars is red because its dusty ground is rusty.

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Pip’s answer

  1. Mars is red because its dusty ground is rusty.
  2. Rust is the same orange-red that old metal gets.
  3. Wind blows the red dust all around Mars, even into the sky. Whoosh!
  4. Hehe, that's why people call Mars the Red Planet!

For grown-ups

Mars's surface is covered in dust rich in iron oxide, essentially rust. Fine red dust also gets blown into the thin atmosphere, giving the sky a butterscotch tint. That's why Mars looks reddish even from Earth, where you can sometimes spot it as a reddish dot.

Ask your child: What would you want to explore first on Mars?

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