* Astronomy

Immanuel Velikovsky  was a Russian-born American independent scholar, best known as the author of a number of controversial books reinterpreting the events of ancient history, in particular the US bestseller Worlds in Collision, published in 1950.
His books use comparative mythology and ancient literary sources (including the Bible) to argue that Earth has suffered catastrophic close-contacts with other planets (principally Venus and Mars) in ancient times.
In general, Velikovsky's theories have been vigorously rejected or ignored by the academic community. Nonetheless, his books often sold well and gained an enthusiastic support in lay circles, often fuelled by claims of unfair treatment for Velikovsky by orthodox academia.

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Ed ~ basically Velikovsky's theories do not hold  true  against  new observations and understanding of  the solar system.