Question

why is mars red in colour?

Answer 1

Since, there is presence of the iron metal on the planet mars it reacts with oxygen and therefore rusts the iron so because of which mars appears red in colour.

Answer 2

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Mars is often called the 'Red Planet' because it appears in the sky as an orange-red star. The colour caused the ancient Greeks and Romans to name it after their god of war. Today, thanks to visiting spacecraft, we know that the planet's appearance is due to rust in the Martian rocks.