VARIES OVER THE COARSE OF TIME. Curently it is 22.5 degrees.
2006-09-11 17:07:00
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answer #1
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answered by S.A.M. Gunner 7212 6
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The Earth has an axial tilt of 23.5°. The axis is tilted in the same direction throughout a year; however, as the Earth orbits the Sun, the hemisphere tilted away from the Sun will gradually come to be tilted towards the Sun, and vice versa. This effect is the main cause of the seasons. Whichever hemisphere is currently tilted toward the Sun experiences more hours of sunlight each day, and the sunlight at midday also strikes the ground at an angle nearer the vertical and thus delivers more heat.
The Earth's axial tilt varies between 21.5° and 24.5° with a 41,000 year periodicity, while the direction of the tilt gradually undergoes precession, moving in a slow circle over a period of about 25,800 years. However, other factors may change the axial tilt of Earth (and of other planets).
Through time, axial precession changes the position of the Earth in its orbit at which the seasons occur (Precession of the equinoxes). This has little effect on the amount of solar influx (insolation) during times when the orbit is circular, but can have large effects on the strength of the seasons when the Earth's orbit is highly elliptical (Milankovitch cycles).
Source(s):
Milankovitch
2006-09-12 10:02:58
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answer #2
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answered by Anonymous
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The Earth has an axial tilt of 23.5°. The axis is tilted in the same direction throughout a year; however, as the Earth orbits the Sun, the hemisphere tilted away from the Sun will gradually come to be tilted towards the Sun, and vice versa. This effect is the main cause of the seasons. Whichever hemisphere is currently tilted toward the Sun experiences more hours of sunlight each day, and the sunlight at midday also strikes the ground at an angle nearer the vertical and thus delivers more heat.
The Earth's axial tilt varies between 21.5° and 24.5° with a 41,000 year periodicity, while the direction of the tilt gradually undergoes precession, moving in a slow circle over a period of about 25,800 years. However, other factors may change the axial tilt of Earth (and of other planets).
Through time, axial precession changes the position of the Earth in its orbit at which the seasons occur (Precession of the equinoxes). This has little effect on the amount of solar influx (insolation) during times when the orbit is circular, but can have large effects on the strength of the seasons when the Earth's orbit is highly elliptical (Milankovitch cycles).
2006-09-12 00:35:50
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answer #3
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answered by JFAD 5
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The angle of the earth's axis with respect to its orbit around the sun is called the "obliquity of the ecliptic" and is about 23.5 degrees.
2006-09-12 00:08:51
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answer #4
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answered by Anonymous
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22.5 degrees from the vertical.
2006-09-12 00:05:11
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answer #5
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answered by Anonymous
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