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Front (Question)

parallax when measuring stars

Back (Answer)

two viewing location- opposite ends of earth's orbit > 300,000,000 km or 186,000,000 miles apart

use triangle (with base of 2 AU)

measures in parsec (PARallax SECond)- distance of an object with parallax angle of 1 second of arc from earth

one parsec = 206,265 AU, or 3.26 light years (LY)

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