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	Astronomy Chapter 4 - 2015 (The Astronomers 🚀) View
	Astronomy Chapter 4 (The Astronomers 🚀) View
	Astronomy - Ch. 4: History of Astronomy (14 of 16) The Giants of Astronomy: Johannes Kepler (Michel van Biezen) View
	Moon Phases: Crash Course Astronomy #4 (CrashCourse) View
	10-Minute Astronomy: Chapter 4: Earth, Moon u0026 Sky (The Astronomers 🚀) View
	Astronomy - Ch. 4: History of Astronomy (9 of 16) The Power of Observations and Reasoning (Michel van Biezen) View
	Astronomy - Ch. 4: History of Astronomy (10 of 16) The Power of Observations and Reasoning (Michel van Biezen) View
	Astronomy - Ch. 4: History of Astronomy (1 of 16) Key Astronomical Events (Michel van Biezen) View
	Astronomy - Ch. 4: History of Astronomy (11 of 16) The Giants of Astronomy: Nicolaus Copernicus (Michel van Biezen) View
	Astronomy - Ch. 4: History of Astronomy (15 of 16) The Giants of Astronomy: Issac Newton (Michel van Biezen) View