A picture taken by Yang LiweiРAstronomyРthe science of the starsРastronomyРastronomersРtelescopeРthe scientific study of the universe (objects in space), such as s, stars, comets and “black holes”РThe earthРBlack holesРThe Milky WayРcometРMeteorРstarsРsatelliteРThe Solar systemРeight s? ets? other objects
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