person trained to travel and work in space, Astronaut, The curved path of an object as it moves around a planet or star, Orbit, huge system of stars, planets, dust, and gas, Galaxy, The act of sending a rocket or spacecraft into space, Launch, Traveling to space for leisure or recreation, Space tourism, condition where there is little or no gravity, Zero gravity, system that provides air, water, and temperature control for humans, Life support system, place designed for people to live in space or on another planet, Habitat, The process of making a planet suitable for human life, Terraforming, Harmful energy waves found in space, Radiation.

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