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水星

18 件の記事

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惑星の分類内惑星と外惑星の違いとは

惑星内惑星外惑星地球
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An angle ε is drawn between two straight lines from Earth to the Sun, and from Earth to the planet. This is demonstrated for different positions along circular orbits, both for planets closer to the Sun (where the angle is always less than 90°), and for outer planets (for which the angle can range from 0° to 180°), while distinguishing east and west sides.

離角（elongation）とは？天文学における惑星と太陽の角度的な距離を解説

離角最大離角内惑星外惑星
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The transit of Mercury on May 9, 2016. Mercury is visible to the lower left of center. A sun spot is visible above center.

水星の太陽面通過発生メカニズムと観測の科学

水星太陽面通過天文学惑星軌道
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The evolution of the apparent diameter and phases of Venus

惑星の位相地球から見た惑星の満ち欠けの仕組み

惑星位相内惑星外惑星
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A telescopic view of Mars at full phase, featuring its prominent maria and south polar ice cap

アルベド特徴とは？惑星表面の明暗が明かす天文学の歴史

アルベド特徴惑星地質学火星水星
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The Sun, the planets, their moons, and several trans-Neptunian objects

太陽系岩石惑星における水の分布と起源

太陽系岩石惑星水D/H比
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