2011
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Ptolemaeus walled plain; by Jim Katsifolis
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May 2012
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(1989) Magellan (mission to Venus) lancched.
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(1997) GRB 970508 detected by BeppoSAX. First measurement of GRB distance.
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(2009) Herschel Space Observatory launched.
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(1543) Nicolaus Copernicus dies - and probably sees for the first time "De revolutionibus orbium coelestium" on deathbdd.
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