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Glenn Chaple's observing basics: Happy birthday to the first satellite

October 2007: Fifty years ago, the Soviet Union launched Sputnik and initiated a new breed of items for skywatchers to observe.
On October 4, 1957, the Soviet Union launched Sputnik I, the world's first artificial satellite. For the first time in history, earthlings could gaze upward and see a man-made object drifting serenely among the stars.

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