'Pluto was first observed in 1930 at this Flagstaff landmark that opened in 1894'
Lowell Observatory
A SALUTE TO FLAGSTAFF: Pluto was first observed in 1930 at this Flagstaff landmark that opened in 1894
Pluto was first observed in 1930 at this Flagstaff landmark that opened in 1894
Pluto was first observed in 1930 at this Flagstaff landmark that opened in 1894
A SALUTE TO FLAGSTAFF
Lowell Observatory
A SALUTE TO FLAGSTAFF