Today is the human lunar day. These knowledge parents about the moon will be told to the children.

"I do n’t know the moon in hours, call it as a white jade plate."

Today, in 1969, the United States "Apollo 11" landed on the moon, and astronaut Amsterram left a human footprint on the moon for the first time. From July 20th, it was designated as a human lunar day.

The moon is the only natural satellite on the planet and the closest celestial body from the earth. But how much do we know about the moon?

Let ’s take a look at the knowledge about the moon, take the children to take a look ~

The moon itself does not glow

The moon, commonly known as the moon, is the only natural satellite on the earth, and is the fifth largest satellite in the solar system. It does not shine because the surface is launched on the surface.

The moon faces us forever

The lunar turns around the earth for a week is the same as its rotation for a week, which means that it is always facing the earth with the same way. Therefore, what we see on the earth is always the same as the moon, and the side of the back to the earth can only be seen with spacecraft.

The temperature difference between the moon and night of the moon is extremely large

Because there is almost no atmosphere on the surface of the moon, after the temperature adjustment of the atmosphere is missing, the moon will be cold and hot, and the temperature difference between day and night can reach more than 300 degrees.

The moon has 708 hours a day

Compared with the earth, the moon is "slow -paced", it takes 708 hours a week. In other words, one day on the moon is equivalent to 29.5 days on the earth!

The moon is away from us

The moon deviates from 3.8cm out of the orbit every year. According to data, at the beginning of the moon, the distance from the earth was only 20,000 kilometers, and the distance between the two has now expanded to 380,000 kilometers. Over time, the distance between the two will become farther and farther.

The footprints on the moon can be preserved for hundreds of years

The atmosphere on the surface of the moon is very thin, with almost no air convection and no wind erosion, so if a footprint is left on the moon, it may be clearly visible after hundreds of years.

There are also "moon shocks" on the moon

Since 1969, several spacecrafts that have landed in the moon have set up multiple instruments to detect moon shocks at different locations of the moon. According to statistics, from 1969 to 1977, these monthly epicons can capture more than 3,000 lunar shocks every year on the moon.

"Super Moon" is really super bright

How "Super Moon" is "Super Moon"? It actually pointed out the full moon at the nearly located place of the moon. When the "Super Moon" appears, it can be seen on the earth that is 14%larger than the average full moon area and 30%high in brightness!

The shape of the moon looks like lemon

When we were young, we often said that the round moon is like a jade plate. If you think that the moon is round like a football, then you are wrong! Due to the influence of the gravity of the earth and the rotation of the moon, the shape of the moon is more like lemon!

Attach you a "Moon Map"

See what "mountains" and "sea" on the front of the moon!

Picture source: National Space Agency

Human Moon Day,

Parents take their children to understand the moon, while

May wish to be with your child

Read this group of ancient poems about the moon.

Comprehensive article from the article | China Global Television Network (CGTN), foreign research institute Unipus, etc.

Figures | Fan Wei

Editor in charge | Zhao Li

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