# Sentence Examples with the word challis

Meanwhile Airy had in July suggested to Challis that the planet should be sought for with the Cambridge equatorial.

Two years later he succeeded Challis as director of the Observatory, where he resided until his death.

The latter was struck by the coincidence, and mentioned it to the Board of Visitors of the Observatory, James Challis and Sir John Herschel being present.

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On the announcement of the fact, Herschel and Challis made known that Adams had already calculated the planet's elements and position.