Public Lecture Series

Ohio State Astronomy and Astrophysics (OSAA) is excited to announce our upcoming events in Spring 2018! OSAA is a partnership between the Department of Astronomy and the Center for Cosmology and Astroparticle Physics.

Planet Nine from Outer Space


Mike Brown

Professor of Planetary Astronomy, Caltech 

March 7, 2018 at 6:30-8:15pm
Center of Science and Industry (COSI)
333 W Broad Street., Columbus
Free and open to the Public


Recent evidence suggests that a massive body is lurking at the outskirts of our solar system, far beyond the orbits of the known giant planets. This object, at a distance approximately 20 times further than Neptune and with a mass approximately 5000 times larger that Pluto, is the real ninth planet of the solar system. I will talk about the observation that led us to the evidence for this Planet Nine and discuss how so massive an object could have been hiding in the outer solar system for so long. Finally I will discuss the international effort to pinpoint this newest member of our planetary family.

Click here for more information on this talk.



Please register here

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Upcoming Events

Please save the date for these upcoming public lectures on astronomy and astrophysics!


Past Events

September 29, 2016: David H. Weinberg on Learning from Gravity: Planet IX, Rippling Space-time, and the Accelerating Universe (OSAA Public Lecture Series)

December 1, 2016: Christopher S. Kochanek on Death By Black Hole (OSAA Public Lecture Series)

January 22, 2017: Laura Cadonati on Listening to the Universe with Gravitational Waves (Science Sundays)

March 9, 2017: Arthur McDonald on Neutrinos, Dark Matter, and the Nature of the Universe (Alpheus Smith Lecture)

March 19, 2017: John Beacom on Neutrino Astronomy Made Easy (Science Sundays)

April 20, 2017: Barbara Ryden on The Dark Side of the Universe (OSAA Public Lecture Series)

November 30, 2017: Scott Gaudi on The Hunt for Other Worlds and Life in the Universe (OSAA Public Lecture Series)

January 18, 2018: Michael Stamatikos on Cosmic Messengers (OSU Newark Lecture)