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astronomical
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The price of that rare painting is astronomical.
Astronomical observations help scientists understand the origins and evolution of stars and galaxies.
The mysterious lights in the sky were unexplained by weather or astronomical events.
The elliptical orbit of the comet was represented by an ellipsoidal trajectory on the astronomical chart.
In his astronomical work the Almagest, Ptolemy used a system of deferents and epicycles to explain the observed motions of planets across the night sky.
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