Equilibrium shape

Japanese: 平衡形状 - ヘイコウケイジョウ
Equilibrium shape
The shape of a celestial body in gravitational equilibrium. If only its own gravity acts and it is in equilibrium with the internal pressure, it will become a sphere, but since celestial bodies usually rotate, centrifugal force acts on them and they are crushed vertically. Ellipsoid Daentai It becomes.

Source: About Shogakukan Digital Daijisen Information | Legend

Japanese:
重力平衡にある天体が示す形状。自己重力のみがはたらき、内部の圧力と平衡している場合には球になるが、ふつう天体は自転しているため、遠心力がはたらき、上下方向につぶれた楕円体だえんたいとなる。

出典 小学館デジタル大辞泉について 情報 | 凡例

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