Joke Collection Website - Mood Talk - Please briefly describe how a lunar eclipse is formed
Please briefly describe how a lunar eclipse is formed
When the moon moves to the shadow part of the earth, the area between the moon and the earth will be blocked by the earth because of the sunlight, and a piece of the moon will be seen missing. At this time, the sun, earth, and moon are exactly (or almost) in the same straight line, which is a lunar eclipse.
When the centers of the Earth and the Moon are roughly on the same straight line, the Moon will completely enter the Earth's umbra, resulting in a total lunar eclipse. And if the moon is always only partially obscured by the earth's umbra, that is, only part of the earth's umbra is, a partial lunar eclipse occurs. There are no annular lunar eclipses on the moon. Because the size of the moon is smaller than that of the earth, the phenomenon of lunar annular eclipse does not occur.
The number of lunar eclipses that occur each year is generally 2, 3 at most, and sometimes none at all. Because under normal circumstances, the moon either passes above the Earth's umbral shadow or leaves below it, and rarely passes through or partially passes through the Earth's umbral shadow, so lunar eclipses generally do not occur.
According to observational statistics, the percentages of penumbral lunar eclipses, partial lunar eclipses, and total lunar eclipses in each century are approximately 36, 60, 34, 46, and 28, 94.
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