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Solar System Home. Neptune is the eighth, and most distant planet from the Sun. It’s the fourth-largest, and the first planet discovered with math. All About Neptune. See All. Big Blue. Neptune is about four times wider than Earth. Number Eight. Neptune is 30 AU from the Sun. Earth = 1 AU. A Neptunian Year.
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. Of the giant planets, Neptune is the densest.
Neptune took shape when the rest of the solar system formed about 4.5 billion years ago when gravity pulled swirling gas and dust in to become this ice giant. Like its neighbor Uranus, Neptune likely formed closer to the Sun and moved to the outer solar system about 4 billion years ago.
Because of Neptune's far distance from the Sun, it gets very little heat. The average surface temperature on Neptune is about −201°C(−331 °F; 72 K).[45] Therefore, at its surface Neptune is the coldest planet in the Solar System. But in the depths of the planet, the temperature rises.
Jun 26, 2024 · Neptune, third most massive planet of the solar system and the eighth and outermost planet from the Sun. Because of its great distance from Earth, it cannot be seen with the unaided eye. With a small telescope, it appears as a tiny, faint blue-green disk. It is designated by the symbol ♆.
Jul 9, 2024 · Neptune is dark, cold, and very windy. It's the last of the planets in our solar system. It's more than 30 times as far from the sun as Earth is. Neptune is very similar to Uranus. It's made of a thick fog of water, ammonia, and methane over an Earth-sized solid center.
Mar 28, 2019 · March 28, 2019. • 6 min read. Neptune may seem like a serene sapphire world at first glance. But don't let its quiet azure hues fool you: The eighth planet from the sun is a wild child. Neptune...
Sep 25, 2019 · Neptune is the fourth largest and the farthest planet of the Solar System with the most powerful wind speeds out of all the planets. It is the smallest of the gas giants and is the first planet to be discovered by mathematical predictions in 1846. Key Facts & Summary.
Neptune is our outermost planet. Neptune has been visited by only one spacecraft: Voyager 2. The majority of worlds we’ve found around other stars are Neptune-sized. By studying Neptune we learn about other solar systems and whether or not ours is unique. Why we study Neptune.
Apr 17, 2023 · Neptune is the eighth and farthest planet from the sun but it is not the coldest. Our solar system 's blue gas giant is far larger than Earth, at more than 17 times Earth's mass and nearly 58...
