Also called the autumn equinox, there is a short moment where night and day are almost exactly equal before the day begins to get shorter. The seasonal change happens because the Earth tilts on its axis, causing the Northern and Southern Hemispheres to swap places. The Earth’s poles are aligned in a straight line, with neither the North nor the South Pole tilted towards or away from the sun. This means the Northern Hemisphere will see colder temperatures and shorter days, marking a significant e
综合
每日快报-科学
2021-09-22 00:00:00.0