PS: The second is that the gravitational force of the moon will also stir up the atmosphere, forming the so-called "air tide". Pen | fun | pavilion www. ｂｉｑｕｇｅ。 info "Tide" can affect the air pressure and weather, for example, the air pressure during the full moon is often low, the ancient Greeks believed that the new moon was red for three consecutive nights, and you should beware of storms; The National Center for Atmospheric Research also found that the worst storms in the United States occur 1-3 days after the new moon or 3-5 days after the full moon. Therefore, it has been advocated that the phases of the moon should be taken into account when forecasting the weather.

3. The Moon is the only satellite of the Earth and has a tidal attraction effect on the Earth. Scientists have confirmed that the gravitational force of the moon can not only induce earthquakes, affect human health and biological activities, but also have an impact on the Earth's weather and climate.

First, the gravitational force of the moon can keep the tilt angle of the earth's axis of rotation stable, so that the earth's climate is relatively stable. As you know, the Moon and the Earth, as two different celestial bodies, have a gravitational pull on each other, and now the tilt angle of the Earth's axis of rotation varies within 5 degrees. However, if there is no moon, the tilt angle of the earth's axis of rotation will change from 0 to 50 degrees in a cycle of millions of years, and the earth's climate will also change drastically, which will eventually make the earth an environment where living things cannot live.

The second is that the gravitational force of the moon will also stir up the atmosphere, forming the so-called "gas tide". "Tides" can affect air pressure and weather, for example, the air pressure during the full moon tends to be low, the ancient Greeks believed that the new moon was red for three consecutive nights, and you should beware of storms; The National Center for Atmospheric Research also found that the worst storms in the United States occur 1-3 days after the new moon or 3-5 days after the full moon. Therefore, it has been advocated that the phases of the moon should be taken into account when forecasting the weather.

Third, the earth will warm slightly on the night of the full moon. This is the case with Climatology expert Robert Brown at Arizona State University in the United States. Bahrain and Randall-Sevigny were discovered by analyzing observations from meteorological satellites. Over the past fifteen years. Meteorological satellites accurately measured subtle changes in the Earth's surface temperature after moonlight irradiation, and found that the average temperature of the Earth increased by 0.017 degrees Celsius at the time of the full moon.

As a matter of fact. The moon itself does not emit light, it transmits heat to the earth through the reflection of sunlight. The brightness is highest during the full moon, when the moonlight on the ground carries about 0.0102 watts of heat per square meter.

NASA scientist Xie Lu. Dr. Pearson's research pointed out that when the solar system was first formed, the Moon was pulled by the Earth as its satellite, and the Moon had a great impact on the Earth in the process of being pulled closer to the Earth.

When the Moon approaches the Earth, the oceans on the Earth's surface experience strong tidal fluctuations, and the huge friction caused by these fluctuations causes the Earth's temperature to increase dramatically. Causing the melting of the center of the earth, the magma in the center of the earth under the action of high temperature and high traction, there is a rotating roll, and the result is a magnetic field, this "supergiant" magnetic field, forming a "protective shield" for the earth, reducing the invasion of cosmic rays from space, and the life on the earth can survive and grow, thanks to the protection of this magnetic field protective shield. Without this protective shield, the radiation from outside would kill all the seedlings of life that first appeared on Earth.

Under the moonlight, the plant grows fast and grows well. Especially for plants that are a few centimeters tall and have not yet teethed, such as sunflowers, corn, etc., it is most beneficial when the flower branches have wounds due to injury. The moon also removes fibrous tissues from wounds that cannot grow long, speeding up metabolism. Allow the wound to heal.

The change of the moon phase also has an effect on the sowing of plants, and carrots, white radish, tomatoes, celery, cabbage, etc. are suitable for sowing at the first quarter of the moon. Eggplant, onions, leeks, pumpkins, etc. are suitable for sowing at the time of the new moon.

(6) Relationships with people

The relationship between man and the moon is also very close, psychiatrists pointed out that about 80% of the human body is liquid, and the gravitational pull of the moon can also act on the fluid in the human body like causing ocean tides, resulting in the human body's "biological **" and "biological low tide", when the moon is full, the biological tide is at its peak, and the moon has a strong impact on human behavior. For example, young people like to fall in love on moonlit nights, while alcoholics and people who are not mentally normal often have seizures on moonlit nights. Maures, a professor at Illinois State University in the United States, even pointed out that human murder, poisoning, depression and heart disease are also related to the waxing and waning of the moon.

(7) Relationship with tides

Tides are the phenomenon of periodic fluctuations in the flow of seawater. Because the day is the morning and the night is the night, the rise and fall of the sea during the day is called "tide", and the rise and fall of the sea water that occurs at night is called "tide". This phenomenon once made the ancients wonder what it was1. The cause caused it. Later, careful people discovered that the tides were delayed for a while every day, and this time was the same as the time when the moon was late every day, so it was thought that the tides and the moon were inevitably related. The relationship between tides and the moon has been mentioned in the ancient Chinese geographical work "The Classic of Mountains and Seas", and Wang Chong in the Eastern Han Dynasty clearly pointed out in his book "On Balance": "The rise of the waves also rises and falls with the moon". But it wasn't until Newton discovered the law of gravitation that Laplace mathematically proved that tidal phenomena were indeed caused by the gravitational pull of the sun and the moon, primarily the moon.

Formation conditions

The law of gravitation states that the magnitude of gravity is directly proportional to the product of the masses of two objects and inversely proportional to the square of the distance between them. The gravitational pull of the Sun on the Earth is much stronger than the gravitational pull of the Moon on the Earth, but the gravitational pull of the Sun is less than 1/2 of that of the Moon. What's going on? It turns out that the gravitational force (or tidal force) that causes the rise and fall of sea water, although it is caused by the gravitational pull of the sun and the moon, is not the absolute gravitational force of the sun and the moon, but the difference between the gravitational force of the attracted object and the gravitational force of the center of the earth. The gravitational force is directly proportional to the mass of the tidal object and inversely proportional to the square of the distance from the object to the Earth. Because the mass of the Sun is 27023369 times that of the Moon, and the average distance between the Sun and the Earth is 389 times that of the average distance between the Moon and the Earth, the gravitational force of the Moon is 2.17 times that of the Sun, thus mechanically proving that the tides are indeed mainly caused by the Moon. To use an analogy, if the tide is 10 meters high at its highest, and almost 7 meters is caused by the Moon, the contribution of the Sun is only 3 meters, and the other planets are less than 0.6 millimeters.

Although the gravitational force of the sun is not too large, it can affect the size of the tide. Sometimes it forms a combined force with the moon and complements each other, and sometimes it is a repulsive force, which counteracts each other. At the New Moon or Full Moon, the Sun and Moon exert gravitational pull in the same direction or in opposite directions, resulting in **; But when the first or second quarter is on, the gravitational pull of the moon opposes the gravitational pull of the sun, and the main ebb and tide occur. Its cycle is about half a month. From the perspective of a year, there are also two highs and lows. During the spring and autumn equinoxes, if the Earth, the Moon and the Sun are almost on the same plane, the gravitational force is greater than that of the other months, resulting in spring and autumn twice a year**. In addition, tides are also related to the proximity of the Moon and the Sun to the Earth. The orbit of the moon is an ellipse, about once every 27.55 days near and far from the earth, the near-earth tide is 39% larger than the far-earth tide, when the near-earth tide coincides with **, the tidal range is particularly large, and if the far-earth tide coincides with the low tide, the tidal range is particularly small. The Earth's orbit around the Sun is also elliptical, with the Sun's gravitational pull being high and the tides being strong at perihelion, and aphelion, having small gravitational pull and weak tides.

From the perspective of one day, due to the rotation of the earth and the revolution of the moon, the tidal waves propagate from east to west, along the direction of the sun's movement, and the time of a tidal rise and fall is half a cloudy day, that is, 12 hours and 25 minutes, which is the so-called semi-diurnal tide, and people who live on the seashore can see the sea rising and falling twice a day in a regular manner. Bai Juyi's good sentence "The dry tide only falls and the evening tide comes, and it flows sixty times in a month" came here.

The actual tide will also be limited by many factors such as geography, coastal location, and ocean current movements. Taking the Qiantang River tide as an example, we know that the Hangzhou Bay at the mouth of the Qiantang River is in the shape of a trumpet, which becomes narrower and narrower the further in, and the sediment brought in during the high tide accumulates at the bottom of the river to form a sand ridge, resulting in a surging tide.

The gravitational force of the Moon creates not only ocean tides on Earth but also atmospheric tides. But the atmospheric tide is far less earth-shattering and majestic than the ocean tide. And because we're in it, it's hard to notice. In addition to this, the gravitational force also causes tides in the earth's body, including the surface (the continents and the parts below the ocean floor), which are called solid tides, and the solid tides cause small fluctuations on the earth's surface, which can only be measured with sophisticated instruments, which may have a subtle effect on the earth's gravitational field. There is a part of the earth's interior that is liquid, so tides are also generated there, and some people believe that the tides in the earth's interior are one of the causes of earthquakes.

The action is always relative, and where there is an action, there is a reaction force. The Moon has a tidal attraction on the Earth, and conversely, the Earth has a tidal attraction on the Moon. Therefore, the force of their interaction is equal, however, because there is no water on the moon, the gravitational force of the earth cannot "make waves" on the lunar surface, but it has a braking effect on the rotation of the moon, making the moon become a synchronous rotating satellite, so the moon always faces us on one side. The Moon also slows down the Earth's self-rotation through the same tidal friction, making the daily day longer and the distance between the Earth and the Moon larger. (To be continued.) )

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