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The goal of the Apollo moon flight was to put a man on the moon. According to Charles Garfield, who worked at NASA on the Apollo mission, the flight was off-course 90 percent of the time between here and the moon. But Apollo used ____ that allowed it to make rapid course corrections.

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Answer:

The answer is an optical navigation system.

Explanation:

This device used a telescope and a sextant (an instrument that measures the angular distance between two visible objects). This way, the astronauts could map the position of the starts and find their location in space. After this information was recorded, it was sent to Earth and analysed through the NASA computers. The station could now send them any instructions related to velocity or course changes.

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