* 地球の回転： 私たちの惑星はその軸を回転させ、約24時間ごとに1つの完全な回転を完了しました。この回転は、昼夜を問わず原因です。
* Sunlight and Shadow: 地球が回転すると、惑星のさまざまな部分が太陽に直面します。 The side facing the sun experiences daylight, while the opposite side is in darkness.
* 日光散乱： The sun's rays are scattered by the Earth's atmosphere, making the sky appear bright during the day. This scattered light makes it difficult to see the sun directly, but we can still see its reflected light.
要するに The sun appears to rise in the east and set in the west because of the Earth's rotation. We can see the sun only when our side of the Earth is facing it, which is during daytime.
