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	Astronomy - Ch. 12: Mars (4 of 25) Basic Properties (Michel van Biezen) View
	Astronomy - Ch. 12: Mars (10 of 25) Time Between Oppositions (Michel van Biezen) View
	Astronomy - Ch. 12: Mars (3 of 40) Topics Covered (Michel van Biezen) View
	Astronomy - Ch. 12: Mars (6 of 25) The Orbit of Mars (Michel van Biezen) View
	Astronomy - Ch. 12: Mars (7 of 25) Tilt Relative to Orbit (Michel van Biezen) View
	Astronomy - Ch. 12: Mars (5 of 25) Size Comparison (Michel van Biezen) View
	Astronomy - Ch. 12: Mars (11 of 25) Past Dates of Mars at Oppostion (Michel van Biezen) View
	Astronomy - Ch. 12: Mars (30 of 62) The Interior of Mars (Michel van Biezen) View
	Astronomy - Ch. 12: Mars (1 of 62) The Mysterious Red Planet (Michel van Biezen) View
	Astronomy - Ch. 12: Mars (18 of 40) Features of the Northern Hemisphere Caps (Michel van Biezen) View