1. The Universe Explained
My view of the universe until now had always been open to suggestion and I hadn't found a concrete theory of the undoubtedly fascinating realm of the physical universe. ... For example, when you view a plane in the sky it appears as if it is moving relatively slowly, when in fact it is flying at speeds usually near 300 mph. Similarly, when scientists view far galaxies, they see them moving away from earth and away from each other. ... Gravity determines the evolution of the universe for this reason. ... He explains that the universe expands and contracts. ...
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