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A discussion of mass and Newton's three laws of motion are presented in Liftoff to Learning: Living and Newton in Space, as scientists explain their relation to space travel. In terms that are easy to understand, the principles behind these concepts are clarified, using animations where needed. Misconceptions and commonly asked questions are addressed, shedding further light on the complex ideas. In addition, the activities of astronauts in space are contrasted with similar activities on Earth. Forces taken for granted on Earth are not, in effect, in space, and the comparisons are thought-provoking.