Whether the moon rises and sets in a northerly or southerly direction

The course of the lunar ship, called the white path, is so close to the ecliptic that it can be confused. Just like the limerick at the beginning, the sun's one-year itinerary can be completed in January. So it's more south-to-north, and the change is extremely rapid.

On August 31, between the summer and the white dew. On the fifteenth day of the lunar calendar, the sun and the moon are opposed. The Moon is close to the equinox, and the declination is slightly less than zero. The rise and fall is slightly southerly. Seven days later, on the twenty-second day of the lunar calendar, the moon approached summer.

The moon rises in the east and sets in the west because the moon is revolving around the earth from west to east, and when the moon moves to a certain time and a certain position, it will appear in people's line of sight, and there is a phenomenon of rising in the east and setting in the west, which can only be seen on the earth

Moon. It orbits the Earth in a circular orbit. The great circle of this orbital plane on the celestial sphere is called the "white path". The plane of the white path does not coincide with the equator of the sky, nor is it parallel to the plane of the ecliptic.

And the spatial position is constantly changing, cycle days. The average inclination of the lunar orbit (white path) to the Earth's orbit (ecliptic) is 5°09. But it is known that the Moon is gradually departing from the Earth at an average rate every year.

What would happen if there was no moon.

The most obvious consequence of the absence of the moon is the change of tides. Although the Sun takes over tidal changes, the Sun's tidal attraction on the Earth is not as great as that of the Moon. So without the participation of the moon, the tides would be one-third of what they are now.

The moon also affects the height of the oceans, and its gravitational pull causes water near the equator to "swell" and swell. If the moon were gone, the water bulging at the equator would spread out and rush towards the poles.

The moon also helps to slow down the rotation of the earth because the tidal changes of the earth caused by the moon are always delayed by the rotation of the earth.

This creates friction between the earth and the ocean. In fact, the moon slows down the earth every day, and without the moon, we would probably be in a state where we only have 6 hours a day.

The rotation of the Earth slows down, while the angular momentum between the Earth and the Moon is conserved.

So the Moon has to move away from the Earth to conform to this law of physics. According to scientists, there will be no total solar eclipse on Earth in 600 million years, as the Moon will move farther and farther away from Earth. Finish.

The moon also rises in the east and sets in the west.

The moon also revolves around the earth.

The 28-day cycle is from west to east, so the moon that we see at the same time every day shifts to the east.

We see on the same day that the moon is moving eastward, and is side-leased because of the rotation of the earth, so like the sun the moon is rising in the east and setting in the west, but due to"The Moon also orbits the Earth once every 28 days, from west to east"Because of this, the moon rises in the east and sets more slowly than the sun.

The moon rises in the east and sets in the west.

Although the moon orbits the earth from west to east, the rotation period is heaven, and the rotation speed is too slow compared to the earth's rotation period, so due to the rotation of the earth from west to east, observers on the earth see the moon rising in the east and setting in the west.

The Moon is the fifth-largest moon in the solar system, with an average radius of about kilometers, which is equivalent to times the radius of the Earth; The mass is close to kilograms, which is twice that of the Earth. The surface of the Moon is covered with craters formed by the impact of small celestial bodies. The average distance between the Moon and the Earth is about 10,000 kilometers, about 30 times the diameter of the Earth.

The orbital motion of the Moon

1. Revolution. The Moon orbits the Earth in a circular orbit. The great circle of this orbital plane on the celestial sphere is called the "white path".

The plane of the white channel does not coincide with the celestial equator, nor is it parallel to the plane of the ecliptic, and the spatial position is constantly changing. Cycle day. The average inclination of the lunar orbit (white path) to the Earth's orbit (ecliptic) is 5°09.

But it is known that the Moon is gradually departing from the Earth at an average rate every year.

2. Rotation. The Moon rotates while revolving around the Earth, and the period day is exactly a sidereal month, so we can't see the far side of the Moon. This phenomenon is called "synchronous rotation", or "tide locking", and is almost a universal law in the world of solar system satellites.

It is thought to be the result of the long-term tidal action of satellites on planets. The balance movement is a wonderful phenomenon that allows us to see 59% of the surface of the moon.

The moon rises in the east and sets in the west. However, the moon rises from the east to the east, to be precise, the earth is used as a reference point, the moon moves from east to west, and the position of the rise is not fixed.

The orbit of the moon around the earth is called the ecliptic, and the ecliptic and the equator are angled, so the summer rise is south-east, the winter rise is north-east, and the spring and autumn are due east.

The second day of junior high school is the rise of the west and the fall of the east, and the fifteenth is the rise of the east and the fall of the west.

The crescent moon is an astronomical phenomenon, which refers to the first day of the lunar month, when the moon moves between the sun and the earth, the skin does the imitation moon to face the earth with a dark side, and rises and sets with the sun, and the moon cannot be seen on the earth.

situation. On the first day of the lunar month, when the moon moves between the sun and the earth, the moon faces the earth with its dark side, and rises and falls with the sun, so people cannot see it. The phases of the moon at this time.

It's called "New Moon".

Topography. The surface of the moon has dark parts and bright areas, the bright areas are highlands, and the dark areas are low-lying areas such as plains or basins, which are called lunar land and burning fiber moon sea, respectively. When early astronomers looked at the Moon, they thought that the dark areas were covered with seawater, so they called them "seas".

The famous ones are the sea of clouds, the wet sea, and the still sea.

Wait. The bright part is the mountains, which are dotted with craters, which are low-lying in a circular uplift. There are more than 33,000 impact craters on the moon with diameters greater than 1,000 meters.

Bailey near Antarctica.

The impact crater is 295 kilometers in diameter and can take the entire Hainan Island.

Put it in. The deepest mountain is Newton.

Impact crater, up to 8,788 meters deep. In addition to impact craters, there are also ordinary mountains on the lunar surface. Mountains and deep valleys are stacked on top of each other, creating a unique scenery.