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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