Which planet is known as the "Red Planet"?

• A. Earth
• B. Venus
• C. Mars
• D. Mercury

Answer: (C)

Mars is known as the "Red Planet" due to its distinct reddish appearance, which is a result of iron oxide, commonly known as rust, present on its surface. This iron oxide reflects sunlight in a way that gives Mars its characteristic color, making it easily recognizable among the other planets in our solar system. The nickname highlights the uniqueness of Mars and has contributed to its prominence in both astronomy and popular culture. In contrast, the other planets listed do not exhibit this reddish hue; Earth is known for its blue oceans and green landmasses, Venus is often referred to as the "Evening Star" because of its brightness, and Mercury is known for its gray, cratered surface.