Earth's Revolution

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Understanding the Earth's Revolution
In addition to rotating on its axis or rotating, the earth also revolves around the sun called the earth's revolution. the time it takes to perform a single revolution is called the time of the revolution. When the earth revolution 365 ¼ days or commonly called 1 year BC. The area taken or passed by the earth during a revolution is called the ecliptic plane. Just as with the earth's rotation, the earth's revolution can not be perceived by man but can only be perceived as a result.

Here is the result of the earth revolution:

1. The occurrence of solar annual pseudo motion
The sun is not always visible in the equator, but sometimes it is in the north of khatliden and the equatorial south. The sun seems to be right in the equator on the 21st of March then the sun as if moving north and after reaching 23.5⁰ North Latitude or the north turning line on 21st of June the sun as if moving back to khatuistiwa. On the 23rd of september the sun seems to be on the equator and the sun seems to be moving in and after reaching 23.5⁰ South Latitude or south line on December 22, the sun will move back towards the equator.

2. Differences in duration of day and night
when it evolved a 23.5 m inclined axis of the earth called an inclination angle. There are times when the northern part of the earth is more inclined or tilted so that the sun is solah in the northern part of the equator of the earth. this causes the northern part of the earth gets more sunlight so it takes longer time while the southern part of the equator gets less sunlight so it takes longer to night time. Likewise, when the southern part of the earth is inclined to the sun, the southern part of the equator of the earth will get more sunshine and experience a longer day.

3. The occurrence of seasons change
Besides resulting in the annual solar pseudo motion and the difference in the duration of day and night. The earth revolution also causes the turn of the season.
a. On March 21 - June 21, the northern hemisphere experiences spring while the southern hemisphere is in autumn.
b. On June 21 - September 23, the northern hemisphere is experiencing summer while the southern hemisphere experiences winter.
c. On September 23 to December 22, the northern hemisphere is experiencing autumn while the southern hemisphere is experiencing spring.
d. On December 22 to March 21, the northern hemisphere experiences winter while the southern hemisphere is experiencing summer

4. Look at different constellations
The constellation is a collection of stars forming certain patterns in the sky. Earth that continues to evolve causes observers on earth to see stars from different directions. When the sun is next to the sun the observer on earth can only see the constellation in the east of the sun. For example in February will be seen constellation Aquarius while the constellation Leo will be seen in August.

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