Slide 1Chapter 29 – Our Solar System "The earth is the cradle of humankind, but one cannot live in the cradle forever." -- Konstantin Tsiolkovsky, 1895 Slide…

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EARLY ASTRONOMY Early cultures identified celestial objects with gods and spirits. They related these objects (and their movements) to phenomena such as rain, drought, seasons,…

âFar better is it to dare mighty things, to win glorious triumphs, even though checkered by failure than to rank with those poor spirits who neither enjoy much nor suffer…