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	Astronomy - Ch. 2: Understanding the Night Sky (6 of 23) Motion of Stars, Earth, Sun, Moon (Michel van Biezen) View
	Astronomy - Ch. 2: Understanding the Night Sky (1 of 23) The Motions of Earth (Michel van Biezen) View
	Astronomy - Ch. 2: Understanding the Night Sky (8 of 23) Understanding Celestial Coordinates (Michel van Biezen) View
	Astronomy - Ch. 2: Understanding the Night Sky (20 of 23) The Sun and Earth's Temperature (Michel van Biezen) View
	Astronomy - Ch. 2: Understanding the Night Sky (2 of 23) What is the Ecliptic Plane (Michel van Biezen) View
	Astronomy - Ch. 2: Understanding the Night Sky (9 of 23) How to Find and Identify (Michel van Biezen) View
	Astronomy - Ch. 2: Understanding the Night Sky (10 of 23) The Constellations (Michel van Biezen) View
	Astronomy - Ch. 2: Understanding the Night Sky (22 of 23) What Are The Milankovitch Cycles (Michel van Biezen) View
	Astronomy - Ch. 2: Understanding the Night Sky (5 of 23) Understanding the Celestial Sphere (Michel van Biezen) View
	Astronomy - Ch. 2: Understanding the Night Sky (4 of 23) What Are Solstice and Equinox (Michel van Biezen) View