Encyclopedia Americana

Encyclopedia Americana

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The position of maximum separation between earth and sun, called aphelion, occurs about July 1 of each year. ... The earth in its annual motion around the sun causes an apparent opposite motion of the sun along a circular path on the sky known as the ecliptic. ... A considerably enhanced reinforcement of the gravitational attractions of sun and moon occurs when these bodies are located in exactly theanbsp;...

Title:Encyclopedia Americana
Publisher: - 1965


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