英语小短文（有关日出日落）

Although the Sun remains in a relatively fixed position with respect to the solar system, Earth rotates daily and revolves around the Sun once a year. The rotations are around an imaginary pole that cuts through the center of the planet in the north-south direction. If you could look down on Earth from above the North Pole, you would see the planet spinning counterclockwise.

Every 24 hours, Earth completes one rotation. With each rotation, most locations on Earth alternately experience day and night. Because Earth is spherical, about half the planet is illuminated by the Sun at any given time. The portion of Earth facing toward the Sun experiences daytime, while the portion facing away from the Sun experiences nighttime. As a location rotates into sunlight, observers from that location see the Sun appear to rise in the east. Similarly, as a location rotates into darkness, observers see the Sun appear to set in the west.

The length of daylight during each rotati