As a result of the Earth Revolution
Besides rotating the Earth's axis, the Earth also made a revolutionary movement around the Sun. The motion of the Earth Revolution is the event of an object moving around the center of a particular object due to gravity. The movement of the Earth circulates around the Sun its path is not circular, but rather oval. Copernicus was the first to suggest that the Earth rotates on its axis once rounds in a day and the Earth moves around the Sun once a year.
Definition of the Earth Revolution
The Earth Revolution is the circulation of the earth around the sun. The earth's revolution is the result of a tug of war between the gravitational force of the sun and the gravitational force of the earth, in addition to the rotation of the earth on its axis or called the rotation of the earth.
When the revolution of the earth in one circle around the sun is 365¼ days. The earth evolved not perpendicular to the ecliptic plane but tilted in the same direction to form an angle of 23.50 to the sun, this angle was measured from an imaginary line connecting the north pole and south pole called the axis of rotation.
As a result of the Earth Revolution
Change in Season
The northern and southern hemisphere experiences four seasons. The four seasons are spring, summer, autumn, and winter. The following is a season table for specific times and regions in the hemisphere.
Seasons in the northern hemisphere
Spring: March 21 to June 21
Summer: June 21 to September 23
Autumn: September 23 - December 22
Winter: December 22 - March 21
The seasons are divided by the earth
Spring: September 23 to December 22
Summer: December 22 to March 21
Autumn: March 21 to June 22
Winter: June 21 - September 23
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The Difference Between Day and Night Time
The Difference Between Day and Night Time
Between March 21 and September 23
The north pole approaches the sun, while the south pole away from the sun.
The northern hemisphere receives more sun than the southern hemisphere.
The length of the day in the northern hemisphere is longer than in the southern hemisphere.
There are areas around the north pole that experience 24-hour day and there are areas around the south pole that experience 24-hour nights.
Between September 23 and March 21
The south pole is closer to the sun, while the north pole is closer to the sun.
The southern hemisphere receives more sun than the northern hemisphere.
The length of the day in the southern hemisphere is longer than the northern hemisphere.
There are areas around the north pole that experience 24-hour nights and there are areas around the south pole that experience 24-hour day.
On March 21 and December 23
The north pole and south pole are the same distance to the sun.
The northern hemisphere and the southern hemisphere receive as much sun.
The length of day and night are the same in all parts of the earth.
In the equator the sun seems to pass directly above the head.
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
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.
Gregorian calendar
Based on the division of longitude, namely the west longitude and east longitude, the international boundary limit is longitude 180o, consequently if the east part of the 180o longitude is on the 15th, then in the western hemisphere the 180o longitude 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 weather conditions on the surface of the earth, for example, occurs day and night, with a change of time of ± 12 hours, for areas 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 daytime and in the South Pole experiencing night, from September 21 to March 21 in the North Pole experiencing the 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.