The Dust-Cloud Hypothesis The universe contains huge clouds made up of very large amounts of dustand gas. About 6,000,000,000 (billion) years ago, one of these clouds began to condense. Gravitation--the pull that all objects in the universe have for one another--pulled the gas and dust particles together. As the dust cloud condensed, it began to spin. It spun faster and faster and flattened as it spun. It became shaped like a pancake that is thick at the centre and thin at the edges. The slowly spinning centre condensed to make the sun. Bu....

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