惑星 - Wikipedia
WEB惑星（ わくせい 、. （. 希: πλανήτης [注釈 1] 、 羅: planēta 、 英: planet ）とは、 恒星 の周りを回る 天体 のうち、比較的低 質量 のものをいう。. 正確には、 褐色矮星 の理論的下限質量（ 木星 質量の十数倍程度）よりも質量の低いものを指す。. ただし ...
惑星 - Wiktionary, the free dictionary
WEBMay 26, 2024 · 惑星 (wakusei): a collection of planets. Etymology [edit] Wasei kango: Calque of Dutch dwaalster (literally “ wander star ”), composed as a compound of 惑 (waku, “ to move about confusedly, to wander ”) + 星 (sei, “ star ”).
Planet - Wikipedia
WEBPlanet. The eight planets of the Solar System with size to scale (up to down, left to right): Saturn, Jupiter, Uranus, Neptune (outer planets), Earth, Venus, Mars, and Mercury (inner planets) A planet is a large, rounded astronomical body that is neither a star nor its remnant. The best available theory of planet formation is the nebular ...
太陽系 - Wikipedia
WEB太陽系 （たいようけい、 英: Solar System [注 2] 、 羅: systema solare シュステーマ・ソーラーレ）とは、 太陽 およびその 重力 で周囲を直接的、あるいは間接的に 公転 する 天体 [注 3] から構成される 惑星系 である。. 主に、現在確認されている8個の 惑星 [注 4 ...
Planets - NASA Science
WEBThere are five officially recognized dwarf planets in our solar system: Ceres, Pluto, Haumea, Makemake, and Eris. The inner, rocky planets are Mercury , Venus , Earth, and Mars. These worlds also are known as terrestrial planets because they have solid surfaces. Mercury, Earth, and Mars are currently being explored by spacecraft.
太陽系の惑星とは？順番や特徴、大きさ、距離、英語名について …
WEBMar 14, 2022 · 太陽系は太陽を中心として、太陽の重力によってその周囲を公転している8つの惑星、5つの準惑星、惑星と準惑星の周囲を公転する衛星から成ります。
太陽系の天体の一覧 - Wikipedia
WEB右上：木星から海王星までの各惑星および冥王星の軌道と、エッジワース・カイパーベルトおよびセドナ. 右下：セドナの軌道. 左下：オールトの雲. 太陽系の天体の一覧 （たいようけいのてんたいのいちらん、List of solar system objects）は、軌道ごとに、太陽 ...
Solar System Exploration - NASA Science
WEBSaturn’s largest moon Titan is an exceptional world. Among our solar system’s more than 290 known moons, Titan is the only one with a substantial atmosphere. And of all the places in the solar system, Titan is the only place besides Earth known to have liquid flowing on its surface. Titan has rain, rivers, lakes and seas.
What Is a Planet? | NASA Space Place – NASA Science for Kids
WEBJun 27, 2019 · What Is a Planet? The Short Answer: A planet must do three things: it must orbit a star, it must be big enough to have enough gravity to force a spherical shape, and it must be big enough that its gravity cleared away any objects of a similar size near its orbit. This cosmic cloud, called Sharpless 2-106, is an area where stars (and planets) form.
Saturn - NASA Science
WEBThe farthest planet from Earth discovered by the unaided human eye, Saturn has been known since ancient times. The planet is named for the Roman god of agriculture and wealth, who was also the father of Jupiter. NASA's Eyes is a real-time visualization of our solar system powered by actual planetary science data.
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