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A is for Apogee "The term apogee refers to the point in an elliptical orbit when a spacecraft is farthest from the Earth. During Exploration Flight Test-1, Orion’s flight path will take it to an apogee of 3,600 miles. Just how high is that? A commercial airliner flies about 8 miles above the Earth’s surface, so Orion’s flight is 450 times farther than that."