我们知道平年全年是365天,闰年全年是366天。这是因为地球运行时,不仅自转,而且还不停地绕太阳公转。地球绕太阳公转一周的时间经精确计算是365天5小时48分46秒。因此,人们将365天定为一年,叫做平年。但这样计算,公转一周的时间就少算了5小时48分46秒,每4年就相差23小时15分4秒,接 We know that 365 days a year throughout the year, leap year is 366 days. This is because when the earth is running, it not only rotates but also revolves around the sun. Earth's revolution around the sun for a week is precisely calculated 365 days 5 hours 48 minutes and 46 seconds. Therefore, people will 365 days as a year, called flat year. But this calculation, the revolution of the week on the less the 5 hours 48 minutes and 46 seconds, a difference of 23 hours every 15 minutes and 4 seconds, then