Cloze: Complete the paragraph by filling in the missing terms.

20. Summary: Space Exploration History (D27)

People have observed and studied the moon and other objects in space since ancient times. The invention of the telescope allowed people to see features and objects that had never been seen before. Today scientists use telescopes, satellites, and space probes to study objects in the solar system and beyond. In the future, people may live and work on space stations and moon bases.

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