A person who weighs 100 pounds on Earth would weigh 112 pounds on Neptune. This is because Neptune’s surface gravity is 1.12 times greater than the Earth’s gravity. Neptune is one of the four gas giants in the solar system.
Neptune is approximately 2.8 billion miles from the sun. In 1846, Johann Galle and Heinrich D’Arrest discovered this planet. Neptune’s discovery was through mathematical prediction. A few days after the discovery of Neptune, William Lassell discovered Triton, its largest moon. Thirteen identified moons orbit Neptune. Neptune’s mass is 17 times greater than the Earth’s. With a surface temperature of -235 degrees Fahrenheit, Neptune is a very cold and windy planet. Neptune lies farther from the sun than any other planet in the solar system.