Signs of a hidden Planet Nine in the solar system may not hold up
A remote planet isn’t ruled out, but evidence for one may be an illusion
![Planet Nine illustration](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2021/02/021721_lg_planet-nine_feat.jpg?fit=1030%2C580&ssl=1)
Planet Nine (illustrated) is a hypothetical giant planet hiding at the solar system’s edge — but new work suggests the evidence for it is a mirage.
ESA/Hubble, M. Kornmesser