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Neptune is the eighth and farthest known planet from the Sun. It is the fourth-largest planet in the Solar System by diameter, the third-most-massive planet, and the densest giant planet. It is 17 times the mass of Earth and slightly more massive, but denser and smaller, than fellow ice giant Uranus.
The rings of Neptune are made of extremely dark material, likely organic compounds processed by radiation, similar to those found in the rings of Uranus. [5] The proportion of dust in the rings (between 20% and 70%) is high, [5] while their optical depth is low to moderate, at less than 0.1. [6] Uniquely, the Adams ring includes five distinct ...
Discovery of Neptune. New Berlin Observatory at Linden Street, where Neptune was discovered observationally. Neptune as imaged by the Voyager 2 probe in 1989. The planet Neptune was mathematically predicted before it was directly observed. With a prediction by Urbain Le Verrier, telescopic observations confirming the existence of a major planet ...
Neptune is considered an "ice giant" because of its internal chemical composition. Unlike Jupiter and Saturn, the gas giants of the outer solar system, Neptune is richer in elements heavier than ...
Triton (moon) A black-and-white mosaic of Triton, constructed from Voyager 2 imagery. Triton's massive south polar cap dominates most of the image, with cryovolcanic features such as Leviathan Patera located left of center. Triton is the largest natural satellite of the planet Neptune.
New research unveils a surprising twist in the composition of our Solar System’s distant giants. Scientists Thought They Knew What Uranus and Neptune Were Made Of. They Were Fooled.
The Kuiper belt (/ ˈ k aɪ p ər / KY-pər) [1] is a circumstellar disc in the outer Solar System, extending from the orbit of Neptune at 30 astronomical units (AU) to approximately 50 AU from the Sun. [2]
To figure out this mystery, scientists developed thousands of random statistical computer models of Uranus and Neptune’s interior, created a surface composition, and worked inward.