01 October 2014

Moon Phases And Moon Elongation Angle

As the Earth, the moon also has at least two important motion, ie rotation and revolution of the moon. Where is the moon's rotation on its axis of rotation in the west to the east. While the motion of the moon's orbit revolution around the earth for a month.

Moon is a natural satellite that orbits the earth always. A trip the moon's orbit can be used as a reference time for humans, especially in Moon phase calendar. From day to day the moonlight appearance when viewed from the earth is changing. Layout changes are not in existence in itself, but lies in the position of the moon to the sun. As a result, the moon's face is changing.

Because more months it away from the sun, the light of the moon that can be seen from the earth will be more extensive area of ​​the circle. Change the face of the crescent moon to crescent to full moon to return again referred to the moon phases. So the moon phase changes is strongly related to the distance or angle elongation months. The distance angle or elongation month is the angle formed by the moon and sun relative to the observer on Earth. So that the resulting angle between the observer to another observer in a different location then the result will not be the same.


Moon Phases And Moon Elongation Angle

The Moon is the only natural satellite of the earth. When viewed from the moon is a celestial body position closest to the Earth. Month also became the second object of the brightest after the sun and the only surface of celestial bodies observed easily.

The Moon is the giant stone balls that orbit the earth. Its surface is barren, filled crater from a meteorite explosion billions of years ago.

Moon may be formed when another planet collided with the young Earth. Shattering event came together and formed the moon.

The Moon is the only celestial bodies followers earth 3480 Km in diameter. Moon outstanding at an average distance of 384 421 km. Moon has two important movements in the rotation and revolution of the moon.

Moon rotation is the rotation of the moon on its axis west to east. within one month rotation requires the same time with one revolution around the earth. Therefore the same time rotate and evolve the lunar surface facing the earth relatively fixed. Small changes in the surface of the moon caused the moon bobbing motion axis. Bobbing motion is very small.

Moon Revolution is moon around the earth from west to east. Full revolution once a month on average takes 27 days 7 hours 43.2 minutes. Circulation time of the month is divided into two.

a. Sideris, the time it took moon to get back to its origin. Revolution is used as the base month month in the calendar month, but the time which he used instead of sidereal time but synodic time.

b. Synodic, ie the time taken between the months of parallel position of the sun, and the earth next to the parallel position. The time taken by an average of 29 days 12 hours 44 minutes 2.8 seconds equals 29.53058796 days or rounded into 29,531 days.

Field used in the ecliptic plane around the earth cut by 05°08'52 ". Thus the field on the moon does not coincide with the areas on earth. If both are on the field coincides then every month there will be two eclipses, the eclipse of the sun at the beginning of the month and the lunar eclipse in the middle of the month. However, a solar eclipse or a lunar eclipse occur every year is still about three or four times. This is due to the small cut angle between the field on the plane of the ecliptic.

Moon Phases And Moon Elongation Angle

Moon Phases

Moon is a celestial body that does not have its own light. The light was visible from the Earth actually is sunlight reflected by it. From day to day the shape and size of the moon's light varies according to the position of the sun and moon to the earth.

At the time of the month is exactly between the Earth and the sun is currently gathering or meeting, then all parts of the earth does not receive sunlight are exactly facing the earth. As a result, when the moon is not visible from the earth to the moon termed dead

When the moon moves, then there is the moon that receives sunlight visible from Earth. Part of this month as seen from Earth is very small and form a crescent. That is known as the beginning of the new moon.

The farther moon moves leave the meeting point, the greater the light of the moon is visible from earth. About seven days later after a month off, the moon will appear from the earth with a semi-circular shape.

In the month finally arrived at the point furthest from the sun and fully facing the sun. At the time this happens, the earth was exactly between the moon and the sun. Part months are receiving sunlight almost entirely visible from the earth, the result looks like a sphere full moon.

Moon Elongation Angle

Elongation is the angle formed by the earth-sky objects with the Earth-sun. Elongation angle is the angle between the moon moon and sun. So the moon elongation angle is the angle formed by the earth-moon and earth-sun.

Conjunction is when the position in the direction of the sun, at the time the moon facing the earth is dark so we could not see the moon and the sun shining first month based parallel. In certain circumstances this conjunction position can lead to a solar eclipse. Elongation angle is 0°.

Quadrature equalizer or quarter is moon perpendicular to the line connecting the earth the sun at this phase the moon is half (only half of the moon is bright when viewed from Earth). The phases of the moon occur twice elongation angle 90°.

Opposition is standing in the opposite direction to the sun seen from Earth. In this position the full moon light or the moon appears as a full moon. In certain circumstances this opposition position can lead to a lunar eclipse. Elongation angle is 180°.

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