ロシュ限界の記事

In sectional/side view, a two-dimensional representation of the three-dimensional concept of the Hill sphere, here showing the Earth's "gravity well" (gravitational potential of Earth, blue line), the same for the Moon (red line) and their combined potential (black thick line). Point P is the force free spot, where gravitational forces of Earth and Moon cancel. The sizes of Earth and Moon are in the proportion, but distances and energies are not to scale.

ヒル圏天体の重力支配領域とその力学

ヒル圏重力圏ラグランジュ点軌道力学

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The ring orbiting Saturn consists mostly of chunks of ice and dust. The small dark spot on Saturn is the shadow from Saturn's moon Enceladus.

環システム惑星から小惑星まで広がる宇宙の円盤構造

環システム惑星の環土星の環ケンタウルス族

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Deimos and Phobos as seen from Mars, compared in apparent size to the Moon as seen from Earth

フォボス火星の不気味な小衛星の正体に迫る

フォボス火星の衛星天文学スティックニー・クレーター

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