The moon is a spherical celestial body revolving around the earth and a natural satellite of the earth. Commonly known as the moon or the moon, it was also called Taiyin, Xuantu, Chanjuan and Pan Yu in ancient times.
19, 16 In May, the National Astronomical Observatory of the Chinese Academy of Sciences announced that the research team led by Li Chunlai, a researcher of the Observatory, used Chang 'e-4 data to prove that there were deep substances mainly composed of olivine and low-calcium pyroxene in the Antarctic-aitken basin on the back of the moon. The international academic journal Nature published this important discovery.
At noon on June 26, 2020, local time, the stratospheric infrared observatory "Sophia" of NASA first confirmed the existence of water on the sunny side of the moon.
The average brightness of the moon is 1/465000 of the brightness of the sun, and the brightness varies from 1/630000 to 1/375000. The average brightness at the full moon is-12.7, etc. Its average illumination to the earth is 0.22 lux, which is equivalent to the illumination of 100 watt electric lamp at a distance of 2 1 meter.
The surface of the moon is not a good reflector, and its average albedo is only 9%, and the other 9 1% is absorbed by the moon. The albedo of Guangdong Sea is even lower, about 7%. The albedo of the lunar highlands and craters is 17%, and it seems that the mountains are brighter than the moon sea.