Astronomie
Resultaat 61 - 74 (van 74)
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Ian Ridpath
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Al Gore
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Jacob Kuiper
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Govert Schilling
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Tim Haines | Christopher Riley
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Simon Singh
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Robin Scagell
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Michael Driscoll
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Bernhard Mackowiak
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Govert Schilling
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Anna Maria Lombardi
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Stephen P. Maran
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S.W. Hawking