Question

2. Why is Mars known as the Red planet?

Answer 1

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 theplanet's appearance is due to rust in the Martian rocks.

Answer 2

Mars is known as the Red Planet because iron minerals in the Martian soil oxidize, or rust, causing the soil and atmosphere to look red