Whether the position of the sun rises throughout the year

The direction of sunrise and sunset varies with the seasons, and the position of the sunrise gradually shifts northward from the spring equinox to the summer solstice, moving to the northernmost part of the summer solstice, and returning from the summer solstice to the autumnal equinox. From the autumnal equinox to the winter solstice, the position of the sunrise gradually shifts southward, moving to the southernmost part of the winter solstice, and returning from the winter solstice to the vernal equinox. The sunrise position at the time of the spring and autumn equinoxes is in the middle of this range, which is the ideal benchmark. At this time, it coincides with the spring equinox, the dragon is due east, and the autumn equinox white tiger is due east, and because human beings have entered the agricultural society at this time, the role of the spring and autumn equinoxes is highlighted.

Therefore, although the initial understanding of east, west, north, and south may be earlier, the selection of the sunrise position of the spring and autumn equinoxes as due east as the benchmark of the four directions is most likely to have been formed in the era of agricultural society.

If we only talk about the general orientation, there is no change outside the Tropic of Cancer and the Tropic of Capricorn, and the sun always rises from the southeast north of the Tropic of Capricorn; South of the Tropic of Capricorn, the sun always rises from the northeast; And in the places within the Tropic of Cancer, there is a change, because the place between the Tropic of Cancer has a phenomenon of direct sunlight of the sun, and when the sun shines directly, it rises due east; The sun rises from the southeast when the direct point of the sun is on the south side of the place, and the sun rises from the northeast when the direct point of the sun is on the north side of the place.

1. On the spring and autumn equinoxes, the sun shines directly on the equator, so the change law of the solar altitude angle at noon on that day is from the equator to the north and south poles.

2. On the summer solstice, the sun shines directly on the Tropic of Capricorn, so the change law of the solar altitude angle at noon on the good yard day is from the Tropic of Cancer to the north and south.

3. On the winter solstice, the sun shines directly on the Tropic of Capricorn, so the variation law of the solar altitude angle at noon on that day is decreasing from the Tropic of Cancer to the north and south poles.

The spatial distribution of the noon solar altitude is subtly distributed: the noon solar height decreases from the direct point of the sun to the north and south sides. The time variation of the noon solar height is leaky: the noon solar height is large in summer and the noon solar height is small in winter at the same location.

The height of the Sun at noon decreases from the latitude of the point where the Sun shines directly to the north and south. The summer solstice moves from the Tropic of Cancer to the south and decreases on both sides of the north.

Northern Hemisphere: The area between the equator and the Tropic of Capricorn:

There are two direct solar phenomena in between, and the maximum solar altitude angle is 90 degrees.

Tropic of Cancer and the area north of it:

The Sun shines directly on the Tropic of Capricorn, and the Sun has the smallest altitude angle.

The early sun shines directly at the Tropic of Capricorn, and the altitude angle is the largest.

From the following year, the altitude angle of the sun gradually increased.

From the following year, the solar altitude angle gradually decreases. The same is true for the Southern Hemisphere.

The azimuth of the sun at rise has the following formula, b is the declination of the celestial body, and c is the geographic latitude of the observation point.

cosa=-sinb/cosc

This formula can be derived from spherical trigonometry.

The azimuth angle is calculated from the south point, and the eye-to-earth circle is divided into 360°. The south point is 0 °, the west point is 90 °, the north point is 180 °, and the east point should be able to do it himself.

b Celestial declination refers to the distance between the Sun and the celestial equator (similar to the latitude on our Earth), with the celestial equator being positive in the north and negative in the south.

c The geographical latitude of the observation point, I believe that the landlord should be able to say it better than me. North of the equator is positive and south is negative.

What did you find when you saw this formula? The latitude on Earth is from -90° to +90°, which means that the COSC is always greater than zero.

Then we can find that when sinb is greater than zero (i.e., when the body is in the Northern Hemisphere), the solution a is two solutions between 90° and 270°. The solution of 90-180° corresponds to the azimuth angle of the falling celestial body, and the other angle is the azimuth angle of the celestial body when it rises, which is located between 180-270°, indicating that the celestial body rises in the northeast.

Conversely, when sinb is less than zero (i.e., when the body is in the Southern Hemisphere), the solution A is two solutions between 270° and 90°. The 0-90° solution corresponds to the azimuth angle of the falling celestial body, and the other angle is the azimuth angle of the celestial body when it rises, which is located between 270-360°, indicating that the celestial body rises in the southeast.

To sum up, as long as the celestial body is in the northern half of the sky, as long as it can rise, it must rise in the northeast; If it is in the southern half of the day, as long as it can rise, it must rise from the southeast.

Northern Hemisphere: Equator to Tropic of Capricorn.

The region in between:

There are two direct solar phenomena between them, and the altitude angle of the sun when the direct sunlight is direct.

Maximum, 90 degrees.

Tropic of Cancer and the area north of it:

The Sun shines directly on the Tropic of Capricorn, and the Sun has the smallest altitude angle.

The sun shines directly on the Tropic of Capricorn, and the altitude angle is the largest.

From the following year, the solar altitude angle gradually increased.

From the following year, the solar altitude angle gradually decreased.

Southern Hemisphere. The same is true.

The direct rays of sunlight are centered on the equator and swept north and south with the Tropic of Cancer as the boundary, once a year, and the cycle continues, thus forming the phenomenon of alternating the four seasons on the earth throughout the year.

The change in the position of the sun in the four seasons is mainly caused by the rotation and revolution of the earth. The following is the basic law of the change of the position of the sun in the four seasons:

1.Winter solstice: When the Earth's revolution reaches the winter solstice, the entire region of the Northern Hemisphere is at the lowest point of the Sun. In the Northern Hemisphere, the height of the Sun is at its lowest, the Sun's trajectory in the sky is shorter, and the direct point of the Sun is at the Tropic of Capricorn (the summer solstice in the Southern Hemisphere).

2.Spring equinox: When the earth reaches the vernal equinox, the direct point of the sun is located at the equator. On this day, the northern and southern hemispheres of the earth have equal day and night times, and the days are long and the nights are short, marking the beginning of spring.

3.Summer Solstice: During the summer solstice, the entire region of the Northern Hemisphere is at the highest point of the Sun. In the Northern Hemisphere, the height of the Sun is the highest, the Sun's trajectory in the sky is the longest, and the direct point of the Sun is located at the Tropic of Cancer (the winter solstice in the Southern Hemisphere).

4.Autumnal equinox: When the autumnal equinox is reached, the point of direct sunlight returns to the equator again. On this day, the day and night hours of the northern and southern hemispheres of the earth are equal again, with short days and long nights, marking the beginning of autumn.

In general, the rotation of the Earth and its revolution causes the position of the Sun to change in different seasons. These changes have led to differences in the hours of insolation, solar altitude, and weather seasons in different parts of the planet. It should be noted that the above rule applies to areas outside the equator, where the height of the Sun is relatively stable and does not change much.

Summer: The sun rises and sets from the northeast.

Winter: The sun rises and sets from the southeast.

Reason: When the sun's rays hit the southern hemisphere directly, the sunrise in the southeast and sunset in the southwest of the world, except for the polar day and night sullen areas. When the sun's rays shine directly on the northern hemisphere, there is no sunrise in the north and sunset in the northwest except for the silver cover of the polar day and night areas.

When the sun's rays hit the equator directly, the whole world, except for the poles, rises in the east and sets due west.

Impact: On the summer solstice, the sun rises at about 25 degrees north-east and sets at about 25 degrees north-west latitude in our latitude.

On the winter solstice, the sun rises at about 25 degrees south-east and sets at about 25 degrees south-west latitude in China.

Summary. Hello, dear, I'm glad to answer for you, the sun and the moon rise in the four seasons of the sun to record the position of the sun in the sky at different times on a certain day The answer is: observe the altitude angle of the sun and the moon:

The angle of altitude of the sun in the sky is the angle between the sun and the horizon and can be measured with the help of an instrument such as an elevation meter or an optical projector. Observe the azimuth of the Sun: The azimuth of the Sun Moon in the sky refers to the position of the Sun Moon on the horizon projection and can be measured by using tools such as a compass.

On the same day, it is possible to make several observations at the same time and record the azimuth of the Sun and Moon.

Dear, hello, I'm glad to answer for you, the sun and the moon rise in the four seasons of the sun to record the position of the sun in the air at different times on a certain day The answer is: observe the altitude angle of the sun and the moon: the altitude angle of the sun in the sky refers to the angle between the sun and the horizon, which can be measured with the help of instruments such as elevation meters or optical projectors.

Observe the azimuth of the Sun: The azimuth of the Sun and Moon in the sky refers to the position of the Sun and Moon on the horizon projection, which can be measured by using tools such as a compass. On the same day, it is possible to make several observations at the same time and record the azimuth of the Sun and Moon.

Extended relevance: The sun is the central celestial body of the solar system and occupies the overall mass of the solar system. The eight planets, asteroids, meteors, comets, outer Neptune objects, and interstellar dust in the solar system all revolve around the Sun, and the Sun revolves around the center of the Milky Way.

The Sun is a star located at the center of the solar system, and it is almost an ideal sphere intertwined with hot plasma and magnetic fields. In terms of chemical composition, about three-quarters of the mass of the Sun is now hydrogen, and almost all of the rest is helium, including oxygen, carbon, neon, iron, and other heavy elements with less than 2% of the mass, which uses nuclear fusion to release light and heat into space. The Sun is currently passing through the local interstellar cloud in the local bubble of the Orion Arm at the inner edge of the Milky Way.

At a distance of 17 light-years from Earth, there are 50 of the closest star systems (the closest star to the Sun is a red dwarf called Proxima Centauri, about light-years).