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 »

Planetary scientists in the United States believe that giant diamond chunks may be floating in the fluid hydrogen and helium atmospheres of Saturn and Jupiter, and that at certain altitudes the chunks melt and rain glitt... More »

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 »

Orbitally, Uranus is the closest planet to Neptune. Its orbit is 1.62 billion miles away from Neptune's orbit. However, until Pluto was downgraded from planetary status in 2006, Pluto's orbit was the closest to Neptune's... More »

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

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 » indicates that Neptune's diameter of 15,299 miles is fourth longest among the planets. At 102 trillion trillion kilograms, Neptune has the third-highest mass of the eight planets in the solar system. However, i... More » Science Astronomy Planets