The planet known for its Great Red Spot is Jupiter. The Great Red Spot is a massive, persistent storm larger than Earth, characterized by its reddish color and oval shape. This storm has been raging for at least 350 years, possibly much longer, and its winds can reach speeds of up to 400 kilometers per hour (250 miles per hour). Researchers believe that the storm’s color change may be due to chemical reactions in Jupiter’s atmosphere. Jupiter's size and unique features, like the Great Red Spot, make it a subject of interest for astronomers and planetary scientists.