... 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」
...In twelve months observational astronomy had made such a bound as it hasnever made before or since...
Oliver Lodge 「Pioneers of Science」
...These observational curves soobtained have next to be fed into a fearfully complex machine, which itwould take a whole lecture to make even partially intelligible, but shows its aspect...
Oliver Lodge 「Pioneers of Science」
...His work was not mainly in the field of observational astronomy, andtherefore did not materially influence that branch of science...
Simon Newcomb 「Side-lights on Astronomy and Kindred Fields of Popular Science」
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