Retrograde mean motion resonances occur when orbiting bodies, moving in directions opposite to the dominant sense of motion, experience periodic gravitational interactions that can stabilise their ...

James is a published author with multiple pop-history and science books to his name. He specializes in history, space, strange science, and anything out of the ordinary.View full profile James is a ...

The survival of the valid. Peer review ; The scientific method -- Birth. The bowl of night. The two-sphere universe ; Coordinate systems l The sun -- Epicycles and relative motion. A mechanical ...