The moon and artificial satellites revolve around the earth in elliptical orbits, and the point at which they are closest to the earth is called the perigee. The point at which they are farthest from the earth is called the apogee. [Sadao Murayama] [Reference] |Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend |
月や人工衛星などは地球の周りを楕円(だえん)軌道を描いて公転しているが、その軌道上でもっとも地球に近づく点が近地点である。これに対してもっとも地球から遠ざかる点が遠地点である。 [村山定男] [参照項目] |出典 小学館 日本大百科全書(ニッポニカ)日本大百科全書(ニッポニカ)について 情報 | 凡例 |
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