Allan Kardec

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21. New forces surged in the train of this rotary movement — centripetal and centrifugal force — the first tending to draw every particle to the center, the second tending to cause the recession of every atom from it. Now, the movement accelerating itself, according to the condensation of the nebula and its radius, augmenting as it approaches the lenticular form, the centrifugal force, incessantly developed by these two causes, soon predominated over the central attraction the same as a too rapid movement of a sling breaks the cord, and throws the projectile to a distance.

Thus, the predominance of centrifugal force detached the equatorial circle of the nebula, and with this ring formed a new mass, isolated from the first, but nevertheless in submission to its empire. This mass has conserved its equatorial movement, which, modified, became its movement of translation around the solar body. Moreover, its new state gave to it a rotary movement around its proper center.

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