[Shanghai Technology] This year's Mid -Autumn Festival "Fifteenth Moon Fifteen Circles" | Shanghai Observatory serious science

"Shanghai Technology" and the Shanghai Academy of Sciences Shanghai Observatory jointly produced

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When I was a kid, I often heard the family say

"Fifteen Moon Sixteen Circles"

But this year Mid -Autumn Festival, the moon is

"Fifteen Moon Fifteen Circles"

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The moon will be the most round

At 17:59 pm on September 10th, Beijing time

However, although--

At that time, many places may not be dark yet

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Only after the dark

Only a round moon will float in the sky

The bright moonlight is sprinkled in front of each house's window

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When a big family appreciates the moon together

It is inevitable that you will encounter the soul of the children to ask questions:

"Mom and Dad, why is the moon's cloudless?"

Mid -Autumn Festival this year, Shanghai Observatory, Shanghai Academy of Science and Technology United Chinese Academy of Sciences

Prepare a Mid -Autumn Festival interactive game for everyone

Let children understand the cause of the moon phase

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Moon phase interactive game

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This game requires three people to participate, for example, for a family of three, they need parents and children. The game needs to be carried out in a wide space. For example, on the living room or bed, my father plays the sun, and he has to hold a flashlight to simulate the light, the mother plays the moon, and the children play the earth. in

Sun Dad needs to hold a flashlight

Follow the Moon Mother

Moon mothers need to face the children on the earth around the circle

(This is a reason, do you know why)

And the eyes of the Earth children

Watching the moon mother at all times

(Just like people who enjoy the moon on the ground)

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For example, in the picture below, the sun, the earth, the moon

When arranged in the same direction

Moon mother's face will be completely illuminated by the sun

At this time children see the moon phase

The full moon, also known as "Wang"

Usually on the 15th or 16th of the lunar calendar

Occasionally appear on the 17th lunar calendar

Maybe a child is going to ask at this time, when the sun, the earth, and the moon become a straight line, will the earth not block the sun?

Alas, many classmates mistakenly believe that the change of moon phase is because the earth blocked the sun, but this is really a misunderstanding. Because, most of the time, because the mother is taller than the children, it will not block the light of the flashlight.

For the actual moon, because it has a certain angle from the orbit of the earth's orbital around the sun. Most of the time, the sun and the moon will not be strict on a straight line. When it is really on a straight line, something does happen -that is the monthly food.

For example, the following picture, when the children stand a little higher, the light of the flashlight may be covered by the earth. At this time, the Moon Mother is experiencing "lunar eclipse". If it is really a full -eclipse, you will not see that the moon disappears. Instead, you will find that a round "red moon" hangs in the sky.

In the process of the game, we can add more challenges. When the mother's mother turned around the children of the earth, the sun's father could stop at any time. In the 3 seconds of the shouting, the children on the earth needed to say that the moon mother at this time What is the moon phase, if you are right, reward a piece of moon cake! If you haven't said or answered wrong, hey, he is punished by the mother's tickle.

For example, when the mother starts from the full moon, after looking at a quarter of a circle from top to the back, her half face will be illuminated by flashlights. Children need to answer the mother's moon phase at this time in 3 seconds. Moon! ", Eh-" What do you like? "What kind of moon cake do you like?"

When the mother walked a quarter of a circle, at this time, the baby on the earth would see the mother's not shown on the "flashlight sunlight". At this time At that time, the moon could not be seen in the sky, because the moon towards the dark side facing the earth.
After the mother walked again a quarter of a circle, the moon's bright surface gradually appeared again. When the sun, the earth and the earth, and the earth, and When there is a right corner between the moon, the mother's half face is illuminated by the flashlight again. At this time, the moon phase is the upper moon, which usually occurs when the seventh and eighth day of the lunar calendar. The moon in the string moon is often full of three -dimensional sense, because the shadow of the moon -shaped mountains will be pulled very long. At this time, the moon can be observed, but more details can be seen.

Sometimes mothers may turn to a special angle. At this time, the connection between the sun and the earth is sharp than the connection between the earth and the moon. The moon mother's face will become the shape of the crescent. At this time, the child may hesitate. It's okay, you can boldly tell the children that the moon at this time is Moth's Mei Moon (or Capital Month), crescent, like a boat.

If you do n’t know how to explain, you can look at the following view. The moon is illuminated by the sun. Half half is bright and half is dark. However, people on the earth can only enjoy the moon along the direction of sight. You can see the moon on the side of the dotted line, so only a small part of the moonlight can be seen by us, so the moon phase we see and showing crescents.

If the children can understand even the moth eyebrow moon, then the imagination of TA must be very powerful. Cultivation, maybe it is a future astronomer.

By the way, have you found that this article has been mentioned for a month, that is, "Bangyue". This will be left for everyone to explore when playing games. I wish you all the Mid -Autumn Festival and play happily!

If reproduced, please indicate source

Author: Xiong Yifei, a graduate student in Shanghai Observatory of Chinese Academy of Sciences

Edit: Zheng Pei

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