Neptune is one of the planets that are considered a gas giant. The surface temperature of Neptune is -344.47°F. The gravitational pull of Neptune is 17% stronger than Earth's gravitational pull. Neptune has a giant storm called the great dark spot. It has never ended and it hase been raging on for four hunderd years. The only spacecraft that has ever visited Neptune was NASA’s Voyager 2 spacecraft. The Voyager 2 came close to Neptune's North pole.