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
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