Full Moon, photo by Li Jianji
Are you looking forward to it? super moon is here again! On the night of April 27, the first supermoon of the year will appear. Among them, at 23:22 on April 27, the moon will be closest to the earth, and the distance between the two will be only 357,378 kilometers. At this time, the apparent diameter of the moon is largest. As long as the weather is clear, you can see it from all over the country.
A supermoon is "bigger" than the sun
A supermoon is a full moon that occurs at perigee. The moon is not only full, but also has the largest apparent diameter. At 11:32 on April 27 this year (look), the moon, earth and sun are aligned in approximately a straight line, and the moon is the roundest. But at this time, it is daytime in China and the moon has not yet risen from the east. Therefore, no part of our country can witness the fullest moon. At 23:22 that day, the moon moved to its closest point to the earth, and the distance between the two was only 357,378 kilometers. At this time, the moon's apparent diameter reaches 33.4 arcminutes, which is larger than the apparent diameter of the sun at any time throughout the year. On that day, the apparent diameter of the Sun was only 30.9 arcminutes.
Astronomers believe that the diameter of the earth's natural satellite, the moon, is only 3,476 kilometers, which is a constant. The moon's diameter remains nearly constant throughout each person's long lifetime. However, since the moon moves in an elliptical orbit around the earth, the distance between the two changes every day. Therefore, when the public observes the moon, the apparent diameter of the moon changes every day. During one of the Moon's revolutions around the Earth, a perigee occurs. If at this time, the sun, the earth and the moon happen to be aligned in approximately a straight line (looking at it), a "super moon" will appear. The super moon cycle occurs once every 14 synodic months (413.4 days).
Close-up of the moon's surface, photo by He Yi
html It can be observed in about 30 minutes after the beginning of May
How to observe the super moon? About 30 minutes after moonrise in various places, the moon is round and big, golden in color, and very spectacular. People can take photos with the full moon with the help of trees and houses. Late at night, when the moon is at its zenith, the moonlight is the brightest. People with good eyesight can even try to read and read newspapers under the moonlight.
On April 27 this year, in Guangzhou, the moon rose slowly from the southeast at 19:09. At 23:22, the moon moves to its closest distance to the earth. At this time, the apparent diameter of the moon is the largest. At 0:59 a.m. the next day, the full moon rises to the zenith, located due south, with the horizon reaching its maximum height of 52°. At this time, the atmosphere through which the moonlight passes is the thinnest, making it the best time to appreciate the moon. At 6:44 in the morning, the moon faintly set from the southwest.
(Source: Guangzhou Daily Client)
