Word: triplet
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Dates: during 1930-1939
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...means of photographs, through a new 13-inch "Triplet", the most powerful telescope of its class, that the discovery was made at the Lowell Observatory, and the Harvard Observatory, in its role of distributor of the astronomical news of the Western Hemisphere, is sending word of the discovery to the observatories of the other continents...
...Triplet...