A "roll-off-roof" observatory opens a window to the universe, with the winter sky glistening over a group of telescopes at the Cumeada Observatory, headquarters of the Dark Sky Alqueva Reserve in Portugal.
A "roll-off-roof" observatory opens a window to the universe, with the winter sky glistening over a group of telescopes at the Cumeada Observatory, headquarters of the Dark Sky Alqueva Reserve in Portugal.
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