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dish – n. a round, curved surface
focus – v. bringing light rays or some other electromagnetic radiation closer together to form an image
detect – v. to find, to confirm the presence of
asteroids – n. rocks or planet-like objects that orbit the sun
amateur – n. a person who does something for pleasure and not as a job
extraterrestrial – adj. beyond the Earth, from space
electricity grid – n. the system of generators, transformers and wires designed to provide electricity to a large area
burden – v. to carry or to deal with a heavy or difficult load
