... Even that skilful astronomer Hipparchus, who may be justlycalled the father of observational astronomy, overlooked thispeculiarity, which Ptolemy would seem to have been the first torecognise...
Richard A. Proctor 「Myths and Marvels of Astronomy」
...Refracting astronomical telescopes are now constructed on thisprinciple, it having been discovered that for observational purposesthey possess several advantages over the Galilean instrument...
Thomas Orchard 「The Astronomy of Milton's 'Paradise Lost'」
...In twelve months observational astronomy had made such a bound as it hasnever made before or since...
Oliver Lodge 「Pioneers of Science」
...Nor was activity confined to the observational side of the science...
Simon Newcomb 「Side-lights on Astronomy and Kindred Fields of Popular Science」
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perceivable comprised forestalling
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