The Earth rotates obliquely, I want to ask

The circle formed by the latitude of 0 degrees is a great circle perpendicular to the earth's axis, and the earth's axis of rotation is oblique. This definition is in order to better study the Earth.

It's a matter of swapping references, not confusing the ecliptic plane with the equatorial plane. The meaning of the existence of the ecliptic plane is the change of seasons, and the meaning of the existence of the equatorial plane is the change of day and night. The latitude of 0 degrees was determined in order to distinguish geographically between the northern and southern hemispheres.

The oblique rotation of the Earth is seen according to its axis of rotation.

No matter how you determine the latitude, its axis of rotation does not change, so it is oblique.

The parallels and meridians are related to the Earth's axis, not to the Earth's revolution.

In other words, it is a fact that the Earth's orbital motion is tilted, that is, there is an angle of 66 degrees and 34 minutes between the Earth's axis and the orbital plane of the Earth's revolution.

The division of latitude and longitude is related to the axis of the earth.

The latitude that is now defined is perpendicular to the Earth's axis (the Earth's axis of rotation).

It's not clear what you mean.

If you're talking about making him not vertical, then why define it that way? In this way, aren't the two ends of the Earth's axis (North and South Poles) not 90 degrees of latitude, any longitude??

This is the problem of the equator and the ecliptic, the equator is rotational, and the ecliptic is revolutionary, and there is a difference between the two.

In this way, there is the generation of ecliptic planes and equatorial planes, and there are four seasons of spring, summer, autumn and winter.

In the global climate, you can't find regularity

The rotation of the earth refers to the rotational motion of the earth around the earth's axis, and its direction is from west to east.

The Earth rotates counterclockwise when viewed from the North Pole, and clockwise when viewed from the South Pole.

The rotation of the earth has its significance, with the change of day and night. The reason is that the earth itself is not transparent and does not shine; The sun shines on the earth; Morning and dusk lines will be generated; The day and night alternate for 24 hours.

Local jet lag. The reason is that the earth revolves from west to east around the sun. Local time, time zone and zone time will be generated. Our country is unified to take Beijing time, East 8th District. Same at the same latitude when the sun rises and sets the place.

Geostophic offset. It is mainly used for rivers and atmospheric leaks. the Northern Hemisphere deviates to the right (in the direction of the object's motion); The Southern Hemisphere is biased to the left.

I hope mine can help you return to Kai, thank you!

The direction of the Earth's rotation is (opposite) to the rising and setting of celestial bodies, i.e. (counterclockwise) or (west-to-east).

The Earth rotates from west to east on its axis of rotation, rotating counterclockwise from the North Pole and clockwise from the South Pole. The Earth's axis of rotation is angled to the ecliptic plane, perpendicular to the equatorial plane. The rotation of the earth is an important form of motion of the earth.

Since the Earth is an opaque, non-luminous sphere, the Sun can only illuminate half of the Earth's surface at any one time. The earth is constantly rotating, and day and night are constantly alternating. In addition to the phenomenon of day and night change, the rotation of the earth also produces local time and time zones, and each time zone is based on the local ** meridian.

A time zone is divided every 15° longitude; Based on the 0° meridian, from to is the middle time zone; The east of the central time zone is East 1 to East 12, the west is West 1 to West 12, and the East and West 12 are combined into one time zone. Each time zone is based on the local time of the ** meridian as the regional time of the district.

The direction of the Earth's rotation is related to the rise and west setting of celestial bodies, i.e., from west to east or counterclockwise.

During the revolution of the earth, the earth's axis always has a certain angle of inclination relative to the ecliptic plane (the plane of the earth's revolution around the sun), which is relatively fixed.

Yellow and red corners(aka: ecliptic angle) is the angle of intersection between the earth's orbital plane (ecliptic plane) and the equatorial plane (celestial equatorial plane), also known as the ecliptic elongation. The current angle of the Earth's yellow-red intersection is about 23°26'。

The yellow-red angle is not constant, it has been changing slightly, but it is negligible for a short time because the change is small.

The existence of the yellow-red angle is of great astronomical and geographical significance:

The yellow-red angle is one of the causes of the precession of the earth's axis.

The yellow-red angle is the main reason for the annual variation of the apparent solar day length.

The yellow-red angle is the fundamental reason for the change of the four seasons and the distinction of the five zones on the earth.

During the rotation of the earth, the direction of the earth's axis in cosmic space does not change. The north end of the Earth's axis points to the North Star. The plane of the Earth's orbit is called the ecliptic plane.

The angle between the ecliptic plane and the Earth's rotating equatorial plane is 23°26, that is, the ecliptic angle, as shown in Figure 1. We can think of the plane of the ecliptic as horizontal, with an angle of 66°34 between the Earth's axis and the plane of the ecliptic. That is, the earth is tilted and revolves in an orbital orbit.

Due to the existence of the yellow-red angle, the noon sun height and the length of day and night are different in different regions and seasons during the earth's rotation, resulting in the formation of seasonal changes on the earth.

That's it.

The plane of the earth's orbit is called the ecliptic plane, and the angle between the earth's orbital plane and the earth's rotating equatorial plane is 23°26, and this angle is called the yellow-red angle. It is precisely because of the existence of the yellow-red angle that the earth's rotation around the sun produces four seasons, and also makes the direct point of the sun's rays on the earth appear in an annual cycle between the Tropic of Cancer.

The rotation of the earth and the tilt of the earth's axis have caused a variety of natural climatic environments on the earth (including the change of seasons, which is only one of them).

Due to the tilt of the Earth's axis, the direct point of the Sun is not on the equator for most of the year, and as a result of the rotation, the direct point of the Sun moves periodically between the Tropic of Capricorn throughout the year. As shown in the figure below: (using the Northern Hemisphere as a benchmark).

At the same time, the earth is an approximate sphere, and the uneven heating and the geostrophic deflection force caused by the rotation of the earth lead to the generation of different wind belts, and the joint action of the revolution produces a variety of climatic environments.

The four seasons in the temperate zone, the dry season and the rainy season in the tropics, the polar day around the polar regions, and the polar night.

The seasons alternate.

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If the Earth's axis of rotation were perpendicular to the plane of its orbit, then there would be the following changes compared to now:

The seasons disappear on the earth, and there will be no change of seasons.

The annual range of temperature at the same latitude decreases. Atmospheric rings and ocean currents change, and there is no annual cycle.

The direct point of the sun is always at the equator, and the sun rises and sets at the same time on the earth at the same longitude.

Except for the poles, day and night are equinoxed everywhere on Earth, with sunrise at 6 o'clock and sunset at 6 o'clock local time. The two poles of the Sun are forever circling the horizon. There is no polar day and night.