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| Alphabetical [« »] ask 1 aspect 1 astronomer 6 astronomers 3 astronomy 6 at 23 atmosphere 1 | Frequency [« »] 3 apparent 3 approach 3 around 3 astronomers 3 attention 3 available 3 away | Simon Newcomb Extent of the Universe IntraText - Concordances astronomers |
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1 Text, 16| made by each generation of astronomers have not been sufficiently 2 Text, 16| what an enormous task the astronomers dealing with this problem 3 Text, 20| successive generation of astronomers, through coming centuries,