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

距離太陽第七近的行星

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 · 中文

天王星（英語：Uranus）是一顆在太陽系中離太陽第七近的青色行星，其體積在太陽系中排名第三、質量排名第四。天王星的英文名稱Uranus來自古希臘神話的天空之神烏拉諾斯（Οὐρανός），是克洛諾斯的父親、宙斯的祖父。在西方文化中，天王星是太陽系中唯一以希臘神祇命名的行星，其他行星都依照羅馬神祇命名。与在古代就为人们所知的五顆行星（水星、金星、火星、木星、土星）相比，天王星的亮度也是肉眼可見的，但由於較為黯淡以及緩慢的繞行速度而未被古代的觀測者认定为一颗行星。直到1781年3月13日，威廉·赫歇耳爵士宣布發現天王星，从而在太陽系的現代史上首度擴展已知的界限，也是第一顆使用望遠鏡發現的行星。天王星和海王星的內部和大氣構成不同於更巨大的氣體巨星－木星和土星。同樣的，天文學家設立不同的「冰巨行星」分類來安置它們。天王星大氣的主要成分是氫和氦，還包含較高比例的由水、氨、甲烷等結成的「冰」，與可以探测到的碳氫化合物。天王星是太陽系內大气层最冷的行星，最低溫度只有49K（−224℃）。其外部的大气层具有複杂的雲層結構，水在最低的雲層內，而甲烷組成最高處的雲層。相比较而言，天王星的内部则是由冰和岩石所构成。如同其他的巨行星，天王星也有環系統、磁層和許多衛星。天王星的環系統在行星中非常獨特，因為它的自轉軸斜向一邊，幾乎就躺在公轉太陽的軌道平面上，因而南極和北極也躺在其他行星的赤道位置上。從地球看，天王星的環像是環繞著標靶的圓環，它的衛星則像環繞著鐘的指針（雖然在2007年與2008年該環看來近乎水平）。在1986年，來自太空探测器航海家2號的影像资料顯示天王星實際上是一顆平平無奇的行星，在其可見光的影像中沒有出现像在其他巨行星所擁有的雲彩或風暴。然而，近年內，隨著天王星接近晝夜平分點，地球上的觀測者发现天王星有季節變化的迹象和漸增的天氣活動。天王星上的風速可以達到每秒250公尺。

Abstract from DBpedia / Wikipedia · CC BY-SA