"observatory" - key terms from Wikipedia

alaska volcano observatory
aldershot observatory
allegheny observatory
arecibo observatory
astronomical observatory
bird observatory
european southern observatory
greenwich observatory
griffith observatory
hawaiian volcano observatory
herschel space observatory
hong kong observatory
indoor observatory
infrared space observatory
jodrell bank observatory
keck observatory
lick observatory
lowell observatory
main observatory
manila observatory
maragheh observatory
mauna loa observatory
meteorological observatory
mount washington observatory
mount wilson observatory
national observatory
naval observatory
nice observatory
number one observatory	circle
observatory
observatory	chronometers
observatory	house
orbiting carbon observatory
outdoor observatory
palomar observatory
paris observatory
parkes observatory
pierre auger observatory
royal greenwich observatory
royal observatory
solar and heliospheric observatory
space observatory
special observatory
states naval observatory	flagstaff station
stratospheric observatory	for infrared astronomy
sudbury neutrino observatory
summit observatory
united states naval observatory
united states naval observatory	flagstaff
vatican observatory