Planetary Radio • Feb 09, 2016

Planet 9 From Outer Space!

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On This Episode

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Mike Brown

Planetary Astronomer for California Institute of Technology

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Konstantin Batygin

Assistant Professor of Planetary Science for California Institute of Technology

Mike Brown and Konstantin Batygin fully expect a new and undemotable ninth planet will be found in the outer reaches of the solar system. The Caltech researchers talk about their findings and much more. Emily Lakdawalla has made a wealth of Chinese lunar lander images much more accessible. Have gravity waves been discovered? Bill Nye hopes so, as he also remembers Apollo 14 moonwalker Edgar Mitchell.

Planet 9
Planet 9 Artistic rendering of Planet 9 with the distant Sun in the background.Image: Caltech / R. Hurt (IPAC)
Mike Brown and Konstantin Batygin
Mike Brown and Konstantin Batygin Planet 9 theorists Mike Brown and Konstantin Batygin study the data in Mike’s Caltech office.Image: Mat Kaplan

This week's question:

What was famous astronomer Herschel’s first and middle names?

To submit your answer:

Complete the contest entry form at or write to us at [email protected] no later than Tuesday, February 16th at 8am Pacific Time. Be sure to include your name and mailing address.

Last week's question:

In Earth days, how long is a Pluto day (as well as a Charon day)?


The answer will be revealed next week.

Question from the week before:

Where in the solar system is Anthony Patera?


Anthony Patera is both a shallow depression on Venus that honors Susan B. Anthony and a distinguished professor at MIT.