Which planet is known as the Red Planet?

Mars is known as the Red Planet due to its distinctive reddish appearance, which is primarily caused by iron oxide, commonly known as rust, on its surface. This characteristic color stands out in contrast to the other planets and has led to its nickname. Mars has been a focal point of exploration and study in both astronomy and science fiction, captivating our imagination with its landscape that bears many similarities to Earth. The color associated with Mars is easily recognizable and has been noted in various contexts throughout history, contributing to its popular name. The other planets do not share this specific characteristic that defines Mars as the Red Planet.