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observatory 
Roger Bacon, English Philosopher
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Hipparchus, Ancient Greek Astronomer and Mathematician
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Roger Bacon in His Observatory
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Hipparchus, Greek Astronomer and Mathematician
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Tycho Brahe, Danish Astronomer
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Hubble space telescope, illustration
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Hubble space telescope, illustration
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Radio telescopes, illustration
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Satellites orbiting Earth, illustration
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Night sky view over Cerro Tololo Observatory, Chile
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Night sky view over Cerro Tololo Observatory, Chile
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Moon shining over ALMA radio telescope, Chile
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Hubble space telescope, illustration
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Effelsberg radio telescope, Germany
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Effelsberg radio telescope, Germany
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Hubble space telescope, illustration
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Effelsberg radio telescope, Germany
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Effelsberg radio telescope, Germany
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Effelsberg radio telescope control centre, Germany
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Effelsberg radio telescope, Germany
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Alien contact, conceptual illustration
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Horsehead and Flame Nebulae
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Orion Nebula
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M13 globular star cluster
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M48 open star cluster
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