Venus Rotates Backwards Slowly

Imagine a world where the sun rises in the west, and a single day stretches on for longer than an entire year. This bizarre reality exists on Venus, our planetary neighbor. Unlike every other planet except Uranus, Venus spins clockwise on its axis in a motion known as retrograde rotation. This ponderously slow spin means a Venusian sidereal day is longer than its journey around the Sun. Because of this backward rotation combined with its orbit, the time from one sunrise to the next is still a lengthy 117 Earth days.

The reason for this planetary rebellion is still debated, but the leading theory points not to a single, catastrophic impact, but to a slow, gravitational tug-of-war. Scientists now believe that the immense gravity of the Sun, combined with strong atmospheric tides created by its incredibly dense, heavy atmosphere, acted like a brake over billions of years. This powerful friction could have gradually slowed Venus's original counter-clockwise spin to a complete stop before nudging it into its current, leisurely backward rotation. This slow spin also contributes to the planet's extreme climate, as the atmosphere has ample time to circulate heat, resulting in a uniformly scorching surface temperature across both the day and night sides.