File:Uranus_Voyager2_color_calibrated.png · Wikimedia Commons · See Wikimedia Commons

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天王星

Also known as Sol VII, Georgium Sidus, Sol h, the Georgian Planet, Georgian Planet, the, 34 Tauri, Planet Uranus, Sol 7

太陽系第七惑星

OverviewAI-generated

Uranus is an ice giant and outer planet in the outer Solar System, orbiting the Sun. It was discovered by William Herschel on March 13, 1781, and named after Uranus and Urania. The planet has an atmosphere and includes the moons Cordelia, Ophelia, Bianca, and Cressida.

Its orbital characteristics include a semi-major axis of 2870658186, an eccentricity of 0.04725744, and an inclination of 6.48. The argument of periapsis is 170.95427630, and the longitude of the ascending node is 74.01692503. The synodic period is 369.66. Uranus has a radius of 25559, a mass of 86810, and a flattening of 0.0229. It is represented by the Uranus symbol.

Synthesized by Vinony from 25 facts across 3 sources: Wikidata, PubMed, Vinony graph. Generated from structured data (not the Wikipedia text) and checked against those facts — may still contain errors.

Key facts

Planet.name: Uranus
Planet.symbol: 24px|⛢|class=skin-invert, 24px|♅|class=skin-invert
Planet.image: Uranus Voyager2 color calibrated.png
Planet.caption: Uranus in true colour, as captured by Voyager 2 on January 24, 1986. Its pale, muted appearance is due to a shroud of haze above its clouds.
Planet.background: LightBlue
Planet.discoverer: [[]]
Planet.epoch: J2000
Planet.time_periastron: 17–19 August 2050
Planet.synodic_period: 369.66 days
Planet.avg_speed: 6.80 km/s
Planet.satellites: 29
Planet.equatorial_radius: 4.007 Earths
Planet.polar_radius: 3.929 Earths
Planet.surface_area: 15.91 Earths
Planet.volume: 63.086 Earths
Planet.mass: 14.536 Earths GM=
Planet.moment_of_inertia_factor: (estimate)
Planet.escape_velocity: 21.3 km/s

via Wikipedia infobox

Research

287 papers

Multiple Probe Measurements at Uranus Motivated by Spatial Variability.ReviewSpace science reviews · 2024Wong MH, Rowe-Gurney N, Markham S et al.DOI: 10.1007/s11214-024-01050-9
Plasma Environment, Radiation, Structure, and Evolution of the Uranian System (PERSEUS): A Dedicated Orbiter Mission Concept to Study Space Physics at Uranus.ReviewSpace science reviews · 2023Cohen IJ, Smith EJ, Clark GB et al.DOI: 10.1007/s11214-023-01013-6
We've misunderstood Uranus all these years.Nature · 2025DOI: 10.1038/d41586-025-01074-3
Uranus should be NASA's top target, report finds.Science (New York, N.Y.) · 2022Voosen PDOI: 10.1126/science.abq6108
Photochemical Haze Formation on Titan and Uranus: A Comparative Review.ReviewInternational journal of molecular sciences · 2025Dubois DDOI: 10.3390/ijms26157531
The upper atmospheres of Uranus and Neptune.Philosophical transactions. Series A, Mathematical, physical, and engineering sciences · 2020Melin HDOI: 10.1098/rsta.2019.0478
Auroral emissions from Uranus and Neptune.Philosophical transactions. Series A, Mathematical, physical, and engineering sciences · 2020Lamy LDOI: 10.1098/rsta.2019.0481
Neptune and Uranus: ice or rock giants?Philosophical transactions. Series A, Mathematical, physical, and engineering sciences · 2020Teanby NA, Irwin PGJ, Moses JI et al.DOI: 10.1098/rsta.2019.0489

via PubMed

Article · 日本語

天王星（てんのうせい、Uranus）は、太陽系第7惑星である。太陽系の惑星の中で木星・土星に次いで3番目に大きく、木星・土星・海王星に次いで4番目に重い。1781年3月13日、イギリスの天文学者ウィリアム・ハーシェルにより発見された。名称は、ギリシア神話における天の神ウーラノス（Ουρανός、ラテン文字転写: Ouranos）のラテン語形である。最大等級+5.6等と地球最接近時は肉眼で見える明るさになることもあり、ハーシェルによる発見以前にも恒星として20回以上観測されていた（肉眼観測も含む）。

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