Claim for giant 'Planet Nine' at Solar System's edge takes a hit
· Planet Nine is claimed to be five to 10 times as massive as Earth, in an orbit well beyond Neptune. California Institute of Technology/R. Hurt (IPAC) A team led by Kevin Napier of the University of Michigan, Ann Arbor, decided to test whether selection bias was playing a role. They gathered 14 similarly distant TNOs discovered by three ...