Which planet is known as the Red Planet?

Mars is known as the Red Planet primarily due to its reddish appearance, which is a result of iron oxide, commonly known as rust, that covers its surface. This characteristic coloration is easily visible even from Earth, which is why Mars has earned this nickname.

In contrast, Earth is often referred to as the Blue Planet because of its vast oceans. Jupiter, the largest planet in the solar system, has a mostly gaseous composition with no solid surface and is known for its distinctive bands of color, largely driven by atmospheric phenomena. Venus, while sometimes called Earth's sister planet due to similarities in size and composition, has a thick, toxic atmosphere that gives it a bright, yellowish-white appearance in the sky. Thus, Mars distinctly stands out as the Red Planet, associated with its unique color.