A yellowed page of handwritten mathematics, with some notations. The handwriting refers to “longitude,” “orbital inclination,” and other terms you would expect for calculations about the location of a hypothetical planet.

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1. Robert McNees (mcnees@mastodon.social)'s status on Monday, 13-Mar-2023 15:21:50 UTC Robert McNees

   in reply to

   Elizabeth Langdon Williams's calculations led to predictions for the location of the mysterious "Planet X." Here is a scan of some of her work.

   I don't know whether or not any of her predictions were accurate, or investigated by others. Unfortunately, Constance Lowell (Percival's widow) fired her in 1920. Elizabeth Langdon Williams had married another astronomer, and Constance felt that it would be inappropriate to employ a married woman.

   Image: Arizona Memory Project