Unexplained Mysteries of the Solar System

Unexplained Mysteries of the Solar System

The solar system is old. At roughly 4.6 billion years, it's had plenty of time to sort itself out, settle into predictable orbits, and stop surprising people. And yet, the more spacecraft venture into its outer reaches, the more unexpected things they find. Some of what's known about these eight planets, hundreds of moons, and billions of smaller bodies flatly refuses to fit the standard models. Not in minor, easily-explained ways. In ways that …