Neptune

Neptune is the eighth and farthest-known Solar planet from the Sun. In the Solar System, it is the fourth-largest planet by diameter, the third-most-massive planet, and the densest giant planet. It is 17 times the mass of Earth, slightly more massive than its near-twin Uranus. Neptune is denser and physically smaller than Uranus because its greater mass causes more gravitational compression of its atmosphere. The planet orbits the Sun once every 164.8 years at an average distance of 30.1 AU. It is named after the Roman god of the sea and has the astronomical symbol, representing Neptune's trident. A second symbol, an L-V monogram for 'Le Verrier', analogous to the H monogram for Uranus, was never much used outside of France and is now archaic. Neptune is not visible to the unaided eye and is the only planet in the Solar System found by mathematical prediction rather than by empirical observation.

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Webb Sees Neptune's Auroras for the First Time

Webb Telescope Captures Neptune’s Long-Hidden Auroras in Stunning Detail

James Webb telescope captures auroras on Neptune for first time ever

We've spotted auroras on Neptune for the first time

First-Ever Images of Neptune's Eerie Glow Finally Reveal Missing Aurora

NASA’s Webb Telescope Spots Auroras on Neptune for the First Time

1st images of elusive auroras on Neptune revealed by James Webb Space Telescope

Webb Detects Trihydrogen, Captures Aurorae on Neptune for First Time

Claim: Uranus and Neptune have oceans that are 5000 miles deep

TOI-1453 c: a key sub-Neptune in a system of two exoplanets - EurekAlert

TOI-1453: Sub-Neptune in system of two exoplanets

Fire and clouds: The ultra-hot Neptune that shouldn’t exist - Earth.com

Today's forecast: Partially cloudy skies on an "ultra-hot Neptune" - EurekAlert

Today's forecast: Partially cloudy skies on an 'ultra-hot Neptune'

NASA’s Webb Just Found Something Unexpected Beyond Neptune

Super-Earth vs. Sub-Neptune? The winner is Super-Venus!

Dramatic changes on Uranus, Neptune, Saturn and Jupiter revealed in 10 years of Hubble Telescope images (video)

Discovery! Newfound exoplanet is 4th 'hot Neptune' ever found

What's Inside Uranus and Neptune? A New Way to Find Out

What's Inside Uranus and Neptune? A New Way to Find Out