The average temperature on Neptune is -373 degrees Fahrenheit. Neptune is, on average, 2.8 billion miles from the sun, making it the eighth planet from the sun, which is one reason this planet is so cold.
Neptune's upper atmosphere clouds have a temperature ranging from a bone-chilling -240 degrees to -330 degrees, and these clouds are made from methane ice crystals. The coldest temperature ever measured in this solar system was -391 degrees on Triton, one of Neptune's satellites, and the fastest wind speed ever recorded was on Neptune with a speed of 1200 mph around the older Great Dark Spot. The average wind speed around Neptune's equator is 700 mph.Learn More
Neptune is a gas giant and an outer planet. In the solar system, the three other gas giants are Uranus, Jupiter and Saturn. Gas giants are massive planets that have a composition of mainly gases.Full Answer >
The number of moons is constantly changing for some planets as they are discovered, but at the last official count there are 166 moons, with more than 20 waiting to be recognized as moons. This count is only of the moons that orbit recognized planets in the solar system. There are numerous other satellites, like asteroids, that have what would be considered moons circling them as well.Full Answer >
Jupiter is a gas giant composed almost entirely of hydrogen and helium in various forms, with trace elements taking up only 1 percent of the planet's composition. Although it is small compared to the sun, Jupiter is over twice as heavy as all other planets in the solar system combined.Full Answer >
From largest to smallest, a list of the planets ranked by size is Jupiter, Saturn, Uranus, Neptune, Earth, Venus, Mars and Mercury. The size of the planets can be compared by calculating the radius, diameter, circumference or volume.Full Answer >