REVOLUTION EARTH


Revolution Earth is the circulation of the earth around the sun. The revolution of the earth is the result of the gravitational pull of the sun to the earth's gravity, in addition to rotation of the earth on its axis or rotation of the earth is called.

At the Earth's revolution around the sun one time is 365 ¼ days. Earth evolved is not perpendicular to the plane of the ecliptic but slanted in the same direction makes an angle of 23.50 to the sun, the angle is measured from an imaginary line connecting the north pole and the south pole is called the axis of rotation.

Influence Revolution Earth

1. Differences Long Day and Night
The combination of the revolution of the earth and the tilt the Earth's axis to the ecliptic plane raises some natural phenomena were observed repeated annually.

Between March 21 s.d 23 September

North pole toward the sun, while the south pole away from the sun.
Northern hemisphere receives more sunlight than the southern hemisphere.
Northern hemisphere during the length longer than the southern hemisphere.
There are areas around the North Pole experienced during the 24 hours and there is an area around the south pole of a night 24 hours.
Observed from the equator, the sun seemed to shift to the north.
North pole closest to the sun on June 21. At this time the observer on the equator see the sun shifted 23.5 o north.
Between September 23 s.d March 21

Closer to the south pole toward the sun, while the north polar ice cap away from the sun.
Southern hemisphere receives more sunlight than the northern hemisphere.
Southern hemisphere during the length longer than the northern hemisphere.
There are areas around the north pole which had a 24-hour night and there was an area around the south pole during the 24-hour experience.
Observed from the equator, the sun seemed to shift to the south.
South pole is at the position closest to the sun on December 22. At this time the observer on the equator see the sun shifted 23.5 ° to the south.
On March 21 and 23 December

North pole and the south pole is equal to the sun.
Northern hemisphere and southern hemisphere receives as much sunlight.
Equal length of day and night throughout the hemisphere.
In equatorial matahahari look passes directly overhead.

2. Annual Moot Motion Sun
Shifting the position of the sun to the northern hemisphere (December 22 to June 21) and a shift in the position of the sun from the northern hemisphere to the southern hemisphere (June 21-December 21) is called a quasi-daily motion of the sun. So called because the sun does not actually move. The motion was due to the revolution of the earth with tilted axis of rotation.

3. Season Changes
Northern and southern hemisphere experience the four seasons. The four seasons are spring, summer, autumn, and winter. Here is a table of the pad time and certain areas in the hemisphere

Cleaved season northern hemisphere

Spring: March 21-June 21
Summer: June 21 to September 23
Autumn: September 23 to December 22
Winter: December 22 to March 21
Cleaved seasons Hemisphere

Spring: September 23 to December 22
Summer: 22 December to 21 March
Autumn: March 21-June 22
Winter: June 21 to September 23

4. The appearance changes Constellations
Constellation is the arrangement of the stars are visible from Earth to form certain patterns. The stars form a constellation in fact not at a nearby location. Because of the location of the stars very much, so when observed from the earth as if it looks close. Constellations we know include Aquarius, Pisces, Gemini, Scorpio, Leo, and others.

When the earth is the sun on the east side, we can only see the stars in the eastern sun. When the earth is to the north of the sun, we can only see the stars of the northern sun. Due to the revolution of the earth, the stars are visible from Earth is always changing.

5. Christian calendar
The length of time in a year is 365 days. To accommodate excess of ¼ day each year on the one-year duration was extended one day to 366 days every four years. One day is added in February. Year of the longer day is called a leap year. To make it easier to remember, it is chosen as a leap year is a year out in the fourth. An example is 1984.2000, and others

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