Last Updated：2025/11/25

(astronomy) A unit of mass equal to that of the Earth, used to express the mass of other planets etc. 1 M_🜨 = 6 × 10²⁴ kg.

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Earth mass

Source Word

Earth mass

(astronomy) A unit of mass equal to that of the Earth, used to express the mass of other planets etc. 1 M_🜨 = 6 × 10²⁴ kg.

Japanese Meaning

天文学における単位で、地球の質量（約6×10²⁴kg）に等しい質量を表す。

The newly discovered exoplanet has an estimated mass of 0.8 Earth mass, suggesting it could be rocky.

新たに発見された太陽系外惑星は推定質量が地球の質量の0.8倍で、岩石惑星である可能性が示唆される。

Sense（1）

(astronomy) A unit of mass equal to that of the Earth, used to express the mass of other planets etc. 1 M_🜨 = 6 × 10²⁴ kg.

Earth masses

（ plural ）