Mike Brown, an astronomer at Caltech who originally proposed Planet Nine’s existence with his colleague Konstantin Batygin, says the candidate’s motion suggests it’s on a highly inclined and ...

Mike Brown, the Richard and Barbara Rosenberg Professor and professor of planetary astronomy at the California Institute of Technology (Caltech), has been named a co-winner of the 2012 Kavli Prize in ...

Caltech astronomer Mike Brown points out the "predicted orbit," in yellow, of the theorized Planet Nine while speaking at Caltech Seismology Lab in Pasadena, California, on January 20, 2016.

Caltech professor Mike Brown and assistant professor Konstanin Batygin have been working together to investigate distant objects in our solar system for more than a year and a half.

Dean chats with Mike Brown, the so-called "killer of Pluto," about why Pluto was demoted from planet status and how people have reacted to the change. And about a new planet that might take it's ...