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English: Why is the night sky dark? Where does the universe begin and end? What is 0? What was there before the Big Bang? Has the orbit surrendered to the endless shackles of questions?! Let's enjoy the science of orbits with Jeong Hyeong-don! ◆ 2024 New Goods Block Figure Keychain + Poster Released You can find them at the More Science Store! https://smartstore.naver.com/morescience ◆ Thanks to Editing: Yoo Ga-ram ◆ Unreal Science-More Science Smart Store (Science Goods) https://smartstore.naver.com/morescience ◆ Unreal Science Instagram / unreal.science ◆ Unreal Science Community https://cafe.naver.com/unrealscience ◆ Unreal Science Inquiry E-MAIL: [email protected]