Well here goes:
The orbit around the sun
The day and night rotation
The seasonal spin
The whole solar system and the galaxy is also spinning and moving at the same time so you could count this as either 1 big spin or 2.
2007-01-10 20:35:29
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answer #1
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answered by Anonymous
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Three
1. It rotates on its axis once every 24 hours
2. It orbits the Sun once every 365 days( 1year)
3. It precesses. That is the imaginary line running through the Earth from north to south poles via the centre of the Earth is changing its angle.It does this once every 22,000 (twenty two thousand) years. The evidence for this is angles of given stars are changing very slowly. Hence the Antarctic and Arctic Circles (66 degrees N & S)and the Tropics of Cancer and Capricorn( 23 1/3 degrees N & S) will change.
Refer to Milutin Milankovich, who referred to the Earth's Secret Rythms of heating and cooling.
Firstly, the Earth is not a perfect sphere but slightly flattened at the poles and bulges at the equator due to Sun and Moon gravitational attraction.
Secondly, the Earth's axis gyrates (Precesses) causing the seasons to be at different points of the Earth's orbit.
Thirdly, The tilt of the axis varies from 21.8" to 24.4" (Currently 23.4" and is gradually decreasing) over a 41,000 - year period.
Finally, over 100,000 year period the Earth's orbit changes from being an ellipse to be a near circle.
All these factors have an effect on the heating & cooling of the Earth and its nearness to the Sun, - which man cannot control.
And We Worry about Global Warming.!!!!!
2007-01-12 16:54:49
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answer #2
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answered by lenpol7 7
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Taking an Axis between the North & South Poles, it is spinning clockwise on that system. This takes 24 hrs to complete 360 degrees.
In the Universe, it encircles the Sun, taking 364 days to complete the circle. It is doing this as it continues circling on its own axis as stated above. But it is not circling (spinning) in the same sense.
Whilst it is encircling the Sun it is tilting back and forth 22 1/2 degrees both North & South, 45 degrees in total every 364 days.
Thus, you could argue that it is spinning 3 ways but you could counter argue that it is only spinning one way. It all depends what you wish to call spinning. I would say "revolutions" thus one way only is the answer. The others are oscillations .
2007-01-11 04:50:10
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answer #3
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answered by greatbrickhill 3
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Hello,
(ANS) no.1 The earth is of course spinning on its own verticle axis and that axis is slightly tipped by a couple of degree's. no.2 The earth's axis also wobbles slightly which is how we get the seasons. no.3 The earth also revolves around its own orbit in space around the sun our nearest star (the earths orbit isnt a perfect circle its actually a slight elipse). no.4 The earth also is spinning within the context of our large gallexy i.e spinning all be it extremely slowly around the galatic centre point (focus). no5. you could also argue that the earth is also spinning even more slowly again amongst other groups of galexies within the local group of galexies.
IR
2007-01-11 04:47:06
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answer #4
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answered by Anonymous
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The Earth has three different types of spinning at the same time, each of which achieves a purpose in its rotation:
1- The rotation of the Earth around its self. This is accomplished once every day and causes the day and night as the earth completes one spin around its own axis.
2- The rotation of Earth around the Sun. This is done once approximately every 365.25 days. One year makes one revolution of the earth around the sun. The result of this rotation brings the changes of the months and the seasons every year. Our Earth history that is recorded through the ages shows that this rotation has been observed for 6000 years by astronomers that recorded their observation of this movement through this period.
3- The changes of the Earth tilted axis of rotation around its self, or the wobbling of the earth. The tilted axis of the Earth points to the polar star at the current time and is tilted approximately 23.5 digrees from the line crossing the north pole with the south pole. However, the tilted axis moves one degree every 70 years away from the polar star and changes therefore the polar star depending what star is located on that circle of rotation. The star Vega will become our Polar star in 12000 years resulting in changing the time of summer and winter on the Planet Earth. When the star Vega becomes a polar star, the beginning of the summer for the northern hemisphere will begin around December 20 or 21, not June 21 as it is right now. It is recorded that the star Tuban (which means Serpent) was the polar star during the building of the great pyramids of Egypt. This Polar star is stationary when observed during the night and every other star revolves around it as you might know. The movement of the Polar star cannot be measured by the days since it takes 70 years to move one degree. At a certain location in the pyramid, there is a hole that shows the polar star. Any one looking through this hole can see the polar star through the years. The return of the current polar star, namely Polaris to become the polar star again happens once every 26000 years. This rotation therefore, occurs once every approximately 26000 years.
2007-01-11 06:06:03
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answer #5
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answered by lonelyspirit 5
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Your question is not to specific. The Earth spins around it's axis. The Earth spins around the Sun. Our Solar System spins around within the Galaxy. Whether or not our galaxy spins around anything has yet to be determined. If groups of galaxies spin around anything is unknown.
2007-01-11 04:51:47
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answer #6
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answered by Tim C 4
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there are two ways,
1)it is moving around sun in 365 days,
2)moving on own axis
the galaxis are not revolving in definite orbit,but they are going far from eachother.
2007-01-11 05:08:32
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answer #7
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answered by jay d 1
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