2006-09-25 05:39:58 · 7 answers · asked by Akki 1 in Science & Mathematics ➔ Astronomy & Space
the core is a molten mass locked in a vault. As the gravity of the sun pulls on the earth, combined with the forward momentum of the earth, we establish a revolution of the planet. The fact that the earth has an active seismic body means that our liquid core has gravity act on it. Just like the revolution, the dynamic of forward momentum and solar gravity causes the planet to wobble, or rotate. The fact that is does so at the magnetic poles is due to electron discharge that makes the magnetosphere as well as defines the poles.
Hope that helps....
2006-09-25 05:50:10 · answer #1 · answered by lundstroms2004 6 · 0⤊ 0⤋
Because of a number of reasons, the main one, our Earth is not a perfect sphere. Secondly, the mass and density of the sun is not absolutely perfect. Hence, the space distortion caused by the Sun is not assymetrical, therefore an imperfect gravitational force on the earth mass.
Getting back to the 1st reason, the oval shape of the Earth and the gravitational pull of the sun, and the sun's velocity within the Milky Way, all sum up to cause a spinning mass.
And thirdly, the initial inertial energy during the formation of the solar system was random and, like a curve ball pitcher, the thrust was off-center. The odds of a thrust that was dead-center is astonomical. The odds of missing other large asteroids is also astronomically large.
The only time an object would not spin if the initial thrust was dead center, there were no objects to interfere with its path, the object was absolutely circular and the sun gravitional force was even. Lacking the above, we'll always be spinning.
2006-09-25 20:33:14 · answer #2 · answered by Its not me Its u 7 · 0⤊ 0⤋
It goes back to the formation of the solar system...A huge cloud of gas and dust was minding it's own business while being pulled on from all directions equally by the mass of the galaxy around it. Well something happened, perhaps a nearby supernova went off, and the gas/dust cloud got "disturbed" enough to cause clumping of the cloud's gas and dust creating localized higher gravity areas, which started it contracting. Similar to the way winds circle around a low pressure area on earth, the mass of that cloud tries to find the center of mass, but the gas and dust is still being pulled from the sides which alter it's vector into a path around the center of mass. Eventually a large mass develops in the center (A star/sun) and clumps of other matter circle around the sun (the planets) which all have spin because the planetary spins are the sum of the spin of all the stuff that fell into them forming them.
2006-09-25 13:00:39 · answer #3 · answered by Wt heck? 1 · 1⤊ 0⤋
If it didn't rotate then we'd all go off on a tangent.
2006-09-25 12:47:34 · answer #4 · answered by N3WJL 5 · 0⤊ 0⤋
To reduce boredom.
2006-09-25 14:32:20 · answer #5 · answered by aviophage 7 · 0⤊ 0⤋
Because if it didn't then one side would be hot and the other cold ...
2006-09-25 12:42:32 · answer #6 · answered by RedCloud_1998 6 · 1⤊ 3⤋
It just does.
2006-09-25 14:31:07 · answer #7 · answered by Kat W 2 · 0⤊ 2⤋