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Pseudo Motion of the Sun

Pseudo Motion of the Sun
Shifting the sun's position towards the northern hemisphere (December 22 to June 21) and the shifting position of the sun from the northern hemisphere to the southern hemisphere (June 21 to December 21) is called the daily apparent motion of the sun. So called because the sun is actually not moving. That motion is due to the earth's revolution with a tilted rotation axis.

Visible constellations that differ from month to month, constellations
The constellations are the arrangement of stars that appear from the earth to form certain patterns. The stars forming a constellation are actually not in a close location. Because the location of the stars is very far away, so when observed from the earth as if they appear close together. The constellations that we know include Aquarius, Pisces, Gemini, Scorpio, Leo, and others.
When the earth is to the east of the sun, we can only see stars that are to the east of the sun. When the earth is north of the sun, we can only see stars that are north of the sun. As a result of the earth's revolution, the stars that appear from the earth are always changing.

Christian calendar
Based on the division of longitude, which is west longitude and east longitude, the international boundary limit is longitude 180o, consequently if the east side of the 180o longitude is on the 15th, then in the western hemisphere 180th is still the 14th, as if it jumped one day. The Islamic calendar count is based on the time of the earth's revolution, where one year is 365 ¼ days.
The first Islamic calendar used was the Julius Caesar calendar or the Julian calendar. The Julian calendar is based on the interval between one spring and the next spring in the northern hemisphere. This time interval is exactly 365,242 days or 365 days 5 hours 48 minutes 46 seconds. Julius Caesar set the calendar calculation as follows.

The length of time in a year is 365 days
To accommodate excess ¼ days in each year, the length of one year is extended by 1 day to 366 days every four years. One day is added in February. Longer years a day are called leap years
To make it easier to remember, then chosen as a leap year is a year that runs out in four. Examples are 1984,2000, and others

Earth Revolution
Earth's Rotation and Revolutionary Movement
Earth is a planet, in order the planets closest to the sun are Mercury, Venus, Earth Mars, Jupiter, Saturn, Uranus, Neptune and Pluto. The earth is circulating according to its source with a rotation time of 27.9 hours and the distance of the earth's sun ± 150 million km.
The motion of the earth's rotation will affect the weather conditions on the surface of the earth, for example, during the day and night, with a change of time of ± 12 hours, for the area between 23.50 North and South Latitudes, and ± 6 months for areas around the North and South Poles, from March 21 to September 21 in the North Pole experiencing afternoon days and in the South Pole experiencing night, from September 21 to March 21 in the North Pole experiencing night and in the South Pole experiencing daytime.
The earth circulates around the sun with a revolution of 365.25 days (1 year) in an anti clockwise direction (counterclockwise) and with an average circulation speed of 18.5 miles / sec. Because the ecliptic is elliptical, the sun is one of its central points, so the distance of the earth's sun is not always fixed but it changes.
The Perihelium Point is where the earth circulates closest to the sun, occurring on December 21st. Aphelium Point is the point where the earth is farthest from the sun, occurring on June 21st. Because the earth's revolution and the tilt of the earth's axis towards the ecliptic amounted to 66.50 resulting in seasonal changes in the region which is located between 23.50 North to the North Pole and 23.50 South to the South Pole.