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© Mt. Wilson Observatory
NORTHERN PART OF THE MOON, AT LAST QUARTER. NIGHT IS ADVANCING FROM THE LEFT. THE DARK OVAL PLAIN, SURROUNDED BY A BRIGHT WALL, IS "PLATO." THE MOUNTAINS ABOVE AND TO THE LEFT OF "PLATO" ARE THE "LUNAR ALPS." THE LONGER RANGE, EXTENDING ACROSS THE UPPER LEFT-HAND PART OF THE VIEW, ARE THE "LUNAR APENNINES"
