The hottest Neptune ever gets at its surface, which is defined as the point at which its thick atmosphere is at the same pressure as the Earth's atmosphere at sea level, is -296 F. These temperatures are found at the pol... More »

The average temperature on Neptune is minus 392 degrees Fahrenheit, according to NASA. Neptune is the farthest major planet in Earth's solar system from the Sun, and it is about 30 times farther from the Sun than Earth, ... More » Science Astronomy Planets

Shortly after its discovery, Neptune was referred to as "the planet exterior to Uranus." It was also called "Le Verrier's Planet" after one of the men who discovered it, Urbain Le Verrier. He shares the credit with one o... More » Science Astronomy Planets

Neptune has no identifiable surface layer, and the icy, gaseous atmosphere eventually transitions to a slushy water and liquid ammonia ocean with a rocky, iron core at the center. As the depth increases, the intense pres... More » Science Astronomy Planets

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 syst... More »

Neptune has an average temperature of -373 degrees Fahrenheit, while the clouds that make up the planet's atmosphere range between -240 and -330 degrees Fahrenheit. Neptune is an ice giant that is primarily made up of a ... More »

Based on research, scientists suspect that diamonds fall from the atmosphere like rain on Neptune and Uranus. The conditions are right for this type of phenomena, such as atmospheric pressure, intense heat and carbon ato... More »