Last Updated
：2025/12/06
semi-major axis
Noun
alt-of
alternative
Japanese Meaning
楕円や軌道において、長軸（最大径）の半分の長さ、すなわち「長半径（半長軸）」を指す。 / 天体の公転軌道など、幾何学的・天文学的文脈で中心からの平均距離として解釈される尺度
Sense（1）
（ plural ）
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Alternative form of semimajor axis
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semi-major axis
The planet's semi-major axis determines the size of its orbit and influences its orbital period.
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The planet's semi-major axis determines the size of its orbit and influences its orbital period.
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