The largest planet in our solar system is Jupiter. It is a gas giant and has a diameter of about 86,881 miles (139,822 kilometers), making it more than 11 times wider than Earth. Jupiter is not only known for its size but also for its prominent Great Red Spot, a massive storm that has been raging for centuries. The planet has a strong magnetic field and numerous moons, with 79 confirmed so far, including the largest moon, Ganymede, which is even bigger than the planet Mercury. Jupiter plays a crucial role in the dynamics of our solar system.