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Like Earth, Neptune has a rocky core made up of iron and other metals, with a mass just greater than our planet. Temperatures in the core could reach 9,260 F (5,127 C). Like the...
Neptune's atmosphere is made up mostly of hydrogen and helium with just a little bit of methane. Neptune's neighbor Uranus has a similar makeup; the methane absorbs other colors but reflects blue, giving these ice giants their similar hue.
Being composed primarily of gases and liquids, [21] it has no well-defined solid surface, and orbits the Sun once every 164.8 years at an orbital distance of 30.1 astronomical units (4.5 billion kilometres; 2.8 billion miles). It is named after the Roman god of the sea and has the astronomical symbol , representing Neptune's trident. [e]
It's made of a thick fog of water, ammonia, and methane over an Earth-sized solid center. Its atmosphere is made of hydrogen, helium, and methane. The methane gives Neptune the same blue color as Uranus.
Neptune is the eighth, and most distant planet from the Sun. It’s the fourth-largest, and the first planet discovered with math. More than 30 times as far from the Sun as Earth, Neptune is not visible to the naked eye.
Neptune’s outer atmosphere is composed predominantly of hydrogen and helium, contributing to 98 percent of the atmospheric molecules. Most of the remainder consist of methane gas. Hydrogen and helium are nearly invisible, but the presence of methane gives Neptune a bluish cast.
Most of its mass is a hot, dense fluid of "icy" materials – water, methane and ammonia – above a small rocky core. Neptune's atmosphere is made up mostly of molecular hydrogen, atomic helium and methane. Neptune has 14 known moons which are named after sea gods and nymphs in Greek mythology.
Neptune is made of three main layers: an iron-nickel core, a mantle, and an atmosphere. Neptune does not have a solid surface; the atmosphere leads the way to the superheated mantle. Neptune’s core is made of iron, nickel, and silicates. Its mass is 1.2 times Earth’s mass, and the pressure is nearly twice that found at Earth’s center.
Neptune's rocky core is surrounded by a slushy fluid mix of water, ammonia and methane ice. Astronomer Galileo Galilei was one of the first people to identify Neptune as a space...
Neptune is one of two ice giants in the outer solar system (the other is Uranus). Most (80% or more) of the planet's mass is made up of a hot dense fluid of "icy" materials – water, methane, and ammonia – above a small, rocky core.