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PDF: "The Hubble Space Telescope:
A Hubble Timeline"  Take a brief tour of highlights in the history of Hubble — from the idea of a space telescope, first proposed in the 1920s, to construction and launch of Hubble, and onward through the next glorious years — 20 of them, as of 2010 — and counting. Download PDF (4.5MB) Adobe Reader is required to view the PDF.
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