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	Astronomy - Ch. 4: History of Astronomy (1 of 16) Key Astronomical Events (Michel van Biezen) View
	Astronomy - Ch. 4: History of Astronomy (16 of 16) The Giants of Astronomy: Albert Einstein (Michel van Biezen) View
	Astronomy - Ch. 4: History of Astronomy (14 of 16) The Giants of Astronomy: Johannes Kepler (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 (9 of 16) The Power of Observations and Reasoning (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 (13 of 16) The Giants of Astronomy: Tycho Brahe (Michel van Biezen) View
	Astronomy - Ch. 4: History of Astronomy (12 of 16) The Giants of Astronomy:Galileo Galile (Michel van Biezen) View
	The History Of Astronomy (Insane Curiosity) View
	The Evolution of Astronomy, Chapter 1: The Very Beginnings (Feed My Curiosity) View