The planet whose discovery was initially made by using measured deviations of other planets from regular orbits and the application of Newton's laws of mechanics to predict its existence was:

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The planet whose discovery was initially made by using measured deviations of other planets from regular orbits and the application of Newton's laws of mechanics to predict its existence was Neptune. In the mid-19th century, mathematicians Urbain Le Verrier and John Couch Adams independently calculated the orbital irregularities of Uranus and determined that they were being caused by the gravitational influence of an unknown planet. Neptune was then discovered in 1846 through telescopic observations.

The Planet Whose Discovery Was Initially Made by Using Measured