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Image USNO26inDome
USNO 26in Telescope Dome
Image 0.2-m transit telescope
0.2-meter transit telescope at USNO Flagstaff Station
Image Precision Measuring Machine
The Precision Measuring Machine (PMM) at the USNO Flagstaff Station.
Image USNO-A
An all-sky map of the density of stars within our galaxy derived from the USNO-A astrometric catalog.
USNO Master Clock Time
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