The first lunar eclipse in 2023 will appear on May 5th, which is a penumbral eclipse. At that time, the "face" of the moon will undergo an evolution from bright to dark, and then from dark to bright. China can see the whole process. This is a penumbral eclipse when the moon enters the penumbra of the earth, almost becoming a partial lunar eclipse.
The penumbral eclipse began at 23: 00+02 on the 5th, or even at 65: 438+0: 23 on the 6th, Beijing time, and ended at 3: 34. The whole process lasted more than four hours, and the maximum solar eclipse was 0.989. The eclipse represents the extent to which the moon enters the penumbra of the earth, that is, 98.9% of the diameter of the moon enters the penumbra of the earth.
There may be at most three eclipses a year, or at least none at all. There will be two eclipses on a * * * in 2023. The next eclipse will be a partial solar eclipse on June 29th of/kloc-0, but the maximum eclipse is only 0. 122, which is almost a penumbral eclipse. So these two eclipses in 2023 are still very interesting.
history
In 2283 BC, Mesopotamia recorded the earliest lunar eclipse in the world, followed by China in 1 136 BC. Eclipses have been promoting the development of human understanding. In ancient China and Africa, people thought that the lunar eclipse was "Tengu swallowing the moon", and it was necessary to beat gongs and drums to drive Tengu away.
In the Han Dynasty, Zhang Heng had discovered some principles of lunar eclipse. He thinks that the earth walks in front of the moon and blocks the sunlight. "Day in a hurry, light often source, hidden in the ground. It is called darkness, the stars are faint, and the moonlight is eclipsed. "
In the 4th century BC, Aristotle saw that the shadow of the earth was round from the solar eclipse, but inferred that the earth was spherical. Alistair, an ancient Greek astronomer in the 3rd century BC, and Iba Valley in the 2nd century BC both proposed to measure the relative size of earth-moon system by lunar eclipse. Iba Valley also proposed to observe the lunar eclipse in two distant places at the same time to measure the geographical longitude.
In the 2nd century AD, Ptolemy used the records of ancient solar eclipses to study the movement of the moon, and this method has continued to this day. Before the appearance of rockets and artificial earth satellites, scientists have been exploring the atmospheric structure of the earth by observing eclipses.
Baidu encyclopedia-eclipse