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A unit of astronomical length based on the distance from Earth at which stellar parallax is 1 second of arc
Answer for the clue "A unit of astronomical length based on the distance from Earth at which stellar parallax is 1 second of arc ", 6 letters:
secpar
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n. a unit of astronomical length based on the distance from Earth at which stellar parallax is 1 second of arc; equivalent to 3.262 light years [syn: parsec ]