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Mars: A Time Of Discovery Interest in Mars, the fourth planet from the Sun, began long before people were able to send spacecraft to the Red Planet. Even early astronomers were able to see Mars’ brightness and position
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Document Date: 2014-07-23 02:55:54
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Mars: A Time Of Discovery Interest in Mars, the fourth planet from the Sun, began long before people were able to send spacecraft to the Red Planet. Even early astronomers were able to see Mars’ brightness and position