P7.1 The Solar System Saturn's rings Simulation - Build your own solar system Video - It's OK to be Smart - How big is the solar system? video - crash course in astronomy Podcasts - The history of astronomy part 1 2 3 4 5 P7.2 Gravity and Orbits P7.3 Life Cycles of Stars P7.4 Red Shift P7.5 Origin of the Universe |
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