A planet's rotation is a fossil record of its violent history
In short: While the solar system appears orderly, planets like Venus and Uranus defy the rules. This video explores how early collisions and angular momentum shaped these unique rotations.
Most planets follow an ancient rule inherited from the spinning disk that formed our solar system. However, outliers exist: Venus spins backward, and Uranus rolls on its side. These anomalies are not random; they are the result of violent events in the young solar system, such as massive collisions.
The video examines specific cases including Earth's Moon-forming impact, Jupiter’s extreme rotation, and Saturn’s strange tilt. It also looks beyond our neighborhood to exoplanets like WASP-17b, which orbit their stars backward, illustrating how a planet's spin serves as a permanent record of its developmental history.
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Sources
- Summary by Intellect · source: Why Don't Planets Spin the Same Way?
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