To break things down a bit, Neptune’s atmosphere is made of about 70-80% hydrogen, 15-20% helium, and about 1.5% methane. Neptune is a fascinating planet. For example, its most memorable ...

Neptune is called an “ice giant” because it’s mostly made of a thick, slushy mix of water, methane, and ammonia, which ...

Neptune is about 30 times farther than we are from the Sun (2.8 billion miles to our 93 million miles)—the farthest in the solar system (aside from the dwarf planets). Its effective temperature ...

Here are six incredible facts about Neptune. At the edge of the solar system is a fascinating world of ice and violent 1,000mph winds, Neptune.

Neptune is the windiest planet with winds that can reach up to 1,240mph, which is three times faster than anything recorded on Earth. It is 17 times bigger than Earth and takes 165 years to orbit ...

The gas giant planet Neptune in our solar system has 14 known moons, including the strange backwards-orbiting Triton. See what we know about Neptune's moons.

Explore all 16 of Neptune's moons along with their names and dates of discovery. The Neptunian system hosts some very strange and elusive moons.