Ducks Deluxe : Dr. Ducks Ax Wax (guitar polish and protectant), also guitar strings and other fine guitar accessories. Dr. Duck is the creator, manufacturer, retailer (and wholesal ...
Earth rotation, Earth's rotation, Erdrotation, EOP, Earth rotation parameter, Earth orientation, UT1, UTC, TAI, nutation, precession, polar motion, leap second, VLBI, SLR, GPS, D ...