Engineer, A person who constructs spaceships., X-ray, A type of radiation made of some stars., Planet, A large round object that goes round the sun., Land, The surface of the Earth that is not covered by water., Orbit, The curved path through which objects in space move around a planet or a star., Rocket, It is used for space travel., Astronaut, A person who is trained for traveling in spacecraft., Telescope, A device for watching stars., Infinity, Unlimited space., Ocean, The large mass of salt water that covers most of the Earth’s surface., Neptune, A planet of the solar system.

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