대기 sky atmospheric_phenomenon darkness 천문학 astronomical_object 하늘 universe galaxy 암흑 astronomy 우주 대기층 black 블랙 outer_space atmosphere

Where we live in a huge universe.

Milky way galaxy Form: Barred spiral galaxy Distance: 27,700 ly or 8,500 pc Mass: 3.0× 1012M☉ Diameter: 100K ly If you leave the city and go on a trip, look for the Milky Way at least once:)