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  2. science.nasa.gov › neptune › factsNeptune: Facts - NASA Science

    Dark, cold, and whipped by supersonic winds, ice giant Neptune is more than 30 times as far from the Sun as Earth. Neptune is the only planet in our solar system not visible to the naked eye. In 2011 Neptune completed its first 165-year orbit since its discovery in 1846.

  3. www.space.com › 41-neptune-the-other-blue-planetNeptune: A guide to the windy eighth planet from the sun | Space

    • Why is Neptune blue? The planet's cloud cover has an especially vivid blue tint that is partly due to an as-yet-unidentified compound and the result of the absorption of red light by methane in the planet's mostly hydrogen-helium atmosphere.
    • Neptune FAQs answered by an expert. We asked planetary scientist Dr Michael Roman a few frequently asked questions about Neptune. Dr Michael Roman. Dr Michael Roman is an expert on the giant planets of the solar system.
    • Does Neptune have rings? Neptune is surrounded by unusual rings, which aren't uniform but possess bright thick clumps of dust called arcs. There are at least 5 rings around Neptune — called Galle, Leverrier, Lassell, Arago, and Adams — and they are considered relatively young and short-lived.
    • Neptune by the numbers. Atmospheric composition (by volume): 80% hydrogen, 19% helium, 1.5% methane. Magnetic field: Roughly 27 times more powerful than Earth's.

  4. nineplanets.org › neptuNeptune Facts | Temperature, Surface, Information, History ...

    Sep 25, 2019 · January 4, 2021. 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.

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  6. www.universetoday.com › 65353 › whatWhat is the Coldest Planet of Our Solar System? - Universe Today

    May 27, 2016 · At its core, Neptune reaches temperatures of up to 7273 K (7000 °C; 12632 °F), which is comparable to the surface of the Sun. Neptune Great Dark Spot in High Resolution. Credit: NASA/JPL

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