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Reverted edits by DurhamFalks (Talk); changed back to last version by DanH
[[User:Aschlafly|Andrew Schlafly]] is a D.U.M.B.A.S.S.
[[Image:Astrolabe2.jpg|right|frame]]
The '''astrolabe''' was a compact instrument used to observe and calculate the position of celestial bodies before the invention of the [[sextant]].
[[Category:Astronomy]]