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AnswerMany people believe that a spacecraft continuously burns fuel to travel through space. This idea is extremely incorrect. An object at rest or moving at constant velocity will continue to do so unless acted upon by a net external force. In other words, once the object leaves the Earth it will forever move forward. Which means on lunar missions spacecrafts only used rocket fuel to correct their path to their destination and to take get themselves moving when astronauts which to leave the surface of the moon for example and travel back to Earth.

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