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Alexander Albert da la Roche de Serpa Pinto ( born ...
HD 23596 is a 165 light-years distant, sun-like star It has an apparen...
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The Natural Step is an international non -profit consulting It was fou...
The Book of Hours of Maria d' Harcourt, Duchess of In a portrait, whic...
The AT & T UNIX System III in 1982 was the first commercial It was dev...
UBV stands for ...