"the hour is empty of the moon, and it's white and white."
Today, 1969, the united states of america, apollo 11, made its first human footprint on the moon, and 20 july has since been designated human moon day。
The moon is the only natural satellite of the earth and the closest celestial body to the earth. But what exactly do we know about the moon
The next thing you know about the moon, show the kids
The moon doesn't glow
The moon, commonly known as the moon, is the only natural satellite on earth and the fifth largest in the solar system. It does not itself glow, as the surface reflects the sun。
The moon will always face us with one
The one-week rotation of the moon around the earth is the same as its one-week rotation, which means that it always looks at the earth the same way. So what we see on earth is always the same side of the moon, and that side of the earth can only be seen with a spacecraft。
The moon is very hot day and night
Since the surface of the moon is virtually non-atmosphere, the absence of atmospheric temperature regulation results in a cold and hot state of the moon, with a temperature differential of over 300 degrees by day and night。
The moon has 708 hours a day
Compared to earth, the moon is “slow” and it takes 708 hours a week to rotate. In other words, one day on the moon is equivalent to 29. 5 days on earth
The moon is leaving us
Every year, the moon deviates from orbit by 3. 8 cm. According to the data, the distance between the moon and the earth at its inception was only 20,000 kilometres, and now it has been expanded to 380,000 kilometres. Over time, the distance between the two will become increasingly remote。
The footprints on the moon can be preserved for centuries
The atmosphere on the surface of the moon is thin, there is little air flow and there is no wind erosion, so if a footprint is left on the moon, it may still be visible hundreds of years later。
There's a moon shock on the moon
Since 1969, successive spacecraft landing on the moon have set up several instruments to detect the moon earthquake at different locations. According to statistics, between 1969 and 1977, over 3,000 monthly earthquakes were captured on the moon each year。
"super moon" is really super bright
How "super moon" is "super moon"? It actually refers to the full moon that appears near the moon orbit. When the "super moon" appeared on earth, it was 14% larger than the usual full moon and 30% more bright
The moon is shaped like lemon
When we were kids, we used to say, "the moon is like a jade. If you think the moon is like a football, you're wrong!" because of the gravity of the earth and the rotation of the moon, the moon has become more like a lemon
A copy of the moon map
Let's see what mountains and seas are on the moon
Source: national space agency
Human moon day
While parents take their children to the moon, they are not the only ones to know the moon
Maybe with the kids
Read this set of ancient poems about the moon。
Quil-eun
