Motion that follows Kepler's laws. The motion of planets and moons in the solar system is influenced by other planets, and neither the Sun nor the planets are point masses, so strictly speaking it is not Keplerian motion. However, because they are almost spherical in shape and the size of the celestial bodies is small compared to the distance between them, they can be treated as point masses. As for the latter issue, the gravitational force of the Sun is extremely strong compared to the gravitational force of the other planets, so the influence of the other planets is very small, and in many cases it can be considered Keplerian motion itself. Source : Heibonsha Encyclopedia About MyPedia Information |
ケプラーの法則に従う運動。太陽系における惑星や衛星の運動は,他の惑星の影響を受け,また太陽も惑星も質点ではないので,厳密にはケプラー運動ではない。しかし,形状がほぼ球形であり,天体間の距離にくらべれば天体の大きさが小さいため質点のように扱うことができる。後者の問題についても,太陽の引力が他の惑星の引力に比してきわめて大きいため,他の惑星による影響はごく小さく,多くの場合にはケプラー運動そのものと見なすことができる。
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