academy
architecture
astronomy
astrophysics
blue
bowl
building
cloudy
dish
dome
europe
horizon
investigation
leningrad
observatory
petersburg
pulkovo
radial
radio
research
russia
russian
saintpetersburg
science
scientific
scientist
sky
space
st
station
study
telescope
transport
transportation
travel
watching
work
定額
Russia, St. Petersburg, Pulkovo Observatoryの素材 [FY31072970061]
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