SCEN101 Lecture Notes - Lecture 19: Solar System
1 Dec 2017
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Moment of inertia (i) times angular speed ( ) Moment of inertia (closeness to axis of rotation) (kg m2) When moment of inertia is halved, angular speed doubles. The sun and planets formed together from a cloud of gas and dust (a nebula) Gravitation between materials in the cloud pulled it inward. When pulled inward, spin increased in accord with the conservation of angular momentum. The spinning cloud conformed to the shape of a spinning disk. The center of the disk is the protosun. Planetesimals accreted more matter to become planets. As a nebula shrinks under the influence of gravity, it .
