In Depth | Neptune – NASA Solar System Exploration - Deepstash
Neptune

Dark, cold and whipped by supersonic winds, ice giant Neptune is the eighth and most distant planet in our solar system. More than 30 times as far from the Sun as Earth, Neptune is the only planet ...

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In Depth | Neptune – NASA Solar System Exploration

solarsystem.nasa.gov

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Quick facts

Day: 16 hours

Year: 165 Earth years

Radius: 15,299.4 miles | 24,622 kilometers

Planet type: Ice giant

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Size and distance

With a radius of 5,299.4 miles (24,622 kilometers), Neptune is about four times wider than Earth. If Earth were the size of a nickel, Neptune would be about as big as a baseball.

From an aver...

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Orbit and rotation

One day on neptune takes about 16 hours (the time it takes for Neptune to rotate or spin once). And Neptune makes a complete orbit around the Sun (a year in Neptunian time) in about 165 Earth years...

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Structure

Neptune is one of the two ice giants in the outer solar system (the other is Uranus). Most (80 percent or more) of the planet's mass is made up of a hot dense fluid of "icy" materials—water, methan...

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Formation

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 lik...

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Surface

Neptune does not have a solid surface. Its atmosphere (made up mostly of hydrogen, helium and methane) extends to great depths, gradually merging into water and other melted ices over a heavier, so...

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Atmosphere

Neptune's atmosphere is made up mostly of hydrogen and helium with just a little bit of methane. Neptune's neighbor Uranus is a blue-green color due to such atmospheric methane, but Neptune is a mo...

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Magnetosphere

The main axix of Neptune's magnetic field is tipped over by about 47 degrees compared with the planet's rotation axis.

Like Uranus, whose magnetic axis is tilted about 60 degrees from the axi...

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Rings

Neptune has at least five main rings and four prominent ring arcs that we know of so far. 

Starting near the planet and moving outward, the main rings are named Galle, Leverrier, Lassell...

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Moons

Neptune has 14 known moons, neptune's largest moon Triton was discovered on October 10, 1846, by William Lassell, just 17 days after Johann Gottfried Galle discovered the planet.

Since Neptun...

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Potential for life

Neptune's environment is not conducive to life as we know it. The temperatures, pressures and materials that characterize this planet are most likely too extreme and volatile for organisms to adapt...

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