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galaxy – n. any one of the very large groups of stars that make up the universe
source – n. the cause or origin of something
x-ray – n. powerful invisible rays that can pass through various objects
antenna – n. a device (such as a wire or a metal rod) for sending or receiving radio or television signals
bucket – n. an open container with a handle that is used for carrying things, such as liquids
alien – n. a creature that comes from somewhere other than the planet Earth
