Jupiter is known as the "Giant Planet." It is the largest planet in our solar system, boasting a diameter of about 86,881 miles (139,822 kilometers), significantly larger than Earth. Jupiter's atmosphere is primarily composed of hydrogen and helium, giving it a distinctive appearance with colorful bands and the famous Great Red Spot, a massive storm larger than Earth. Its strong magnetic field and numerous moons, including the four largest known as the Galilean moons, contribute to its fascinating nature. Jupiter's immense size and gravitational pull have significant effects on other celestial bodies in the solar system.