Planet Nine (image) Harvard-Smithsonian Center for Astrophysics Share Print E-Mail Caption This is an artist's conception of Planet Nine. Credit Caltech/R. Hurt (IPAC) Usage Restrictions None Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.