Did you go to see the red moon last night? Although the weather is very cold, but for many astronomy lovers, the passion to see the moon is no less, so do you see the red moon? Why does the total eclipse have the red moon?
On January 31 this year, total lunar eclipse (red moon) can be seen in China, even in Asia, Oceania and North America. Among them, the observation effect of eastern China is better than that of Western China.
The total eclipse of the moon can be divided into five stages: the first loss of 19:48 (the moon just touched the earth's umbra); the first loss of 20:51 (the moon just entered the earth's umbra); the second eclipse of 21:30 (the center of the moon is closest to the center of the earth's umbra); the second eclipse of 22:08 (the moment when the moon emerges from the earth's umbra); and the third reunion of 23:12 (the moon completely leaves the earth's umbra). The whole eclipse lasts for 3 hours and 24 minutes (from initial loss to recovery). The Chinese public can use telescope or telephoto lens to observe and photograph the total lunar eclipse.
Experts explain that when the sun, the earth and the moon are in a line, an eclipse may occur. However, the orbit of the moon around the earth (white track) and the orbit of the earth around the sun (ecliptic) are not in the same plane, but have an angle of 5 degrees and 9 minutes. Therefore, in most cases, the moon passes above or below the dark shadow of the earth, so there will be no eclipse. A total lunar eclipse occurs only when the sun, the earth and the moon are in a real line. For example, total lunar eclipse occurred on January 31 and July 28 this year.
Why does the "Red Moon" appear in the total lunar eclipse? During the total lunar eclipse, when the moon enters the earth's shadow, the public can see the bronze moon, also known as the red moon. It turns out that after the moon enters the dark shadow of the earth, because the earth has a thick atmosphere, it can refract and scatter sunlight. There are red, orange, yellow, green, blue, blue and purple in the sunlight, among which the wavelength of red light is the longest, and the refraction and scattering of red light to the moon surface is the most, so the red moon appears.
If you can't see the total eclipse because of the bad weather, you don't have to be sorry. In the early morning of July 28 this year, Chinese people can also witness the second total lunar eclipse this year. The time is: 2:24 for initial loss, 3:30 for food, 4:22 for food, 5:14 for light and 6:19 for recovery.