'Planet Nine' Can't Hide Much Longer, Scientists Say - Space.com

Space.com
'Planet Nine' Can't Hide Much Longer, Scientists Say
Space.com
Artist's illustration of Planet Nine, a world about 10 times more massive than Earth that may lie undiscovered in the outer solar system. Credit: Caltech/R. Hurt (IPAC). Planet Nine's days of lurking unseen in the dark depths of the outer solar system ...und weitere »