Why Does Earth Rotate?

Scientists are of the opinion that the earth was composed of clouds of gas and dust particles — the nebula that had crushed in itself under the interaction of its core gravity and got a spinning thrust. Further upon undergoing subsequent condensation, it’s just the speculation, the dust particles might have become denser and started rotating with even more speed because of reduced distance from the core.

Earth Rotation Why Does Earth Rotate?

The above background forms the premise of the belief that the earth has been rotating ceaselessly since it came into being. In a lay person’s life normal moving things have to stop at length because of friction and vertical gravitational pull. Now the question as to why our earth doesn’t stop at all is attended by the justification that it is the universal law of inertia that any moving object will keep on moving in space unless acted upon by some external force, whether it is friction or some external force that would hinder the movement of that body, otherwise it will keep on moving considering the object in a frame of reference that is out of the earth, qualifying the pre-requisites of an isolated system.

According to Luhman, ‘the earth is revolving because it was born rotating’. Moreover, the rate of rotation of the earth is receding about 1 millisecond a year under the gravitational pull of the moon. Based on arithmetic calculation if we travel back in time nearly to the times when dinosaurs were there, the length of day should be twenty-two hours approximately. Similarly, the diametrical distance between the moon and the earth is also increasing at the rate of 1 mm per year. This implies that the moon should have looked much larger the size it presently appears to be, says Luhman.

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