Astronomer Mike Brown on killing Pluto

Pluto
This undated image taken by the Hubble telescope shows Pluto and its moons: Charon, Nix, and Hydra.
Photo by NASA via Getty Images

Even though most of us were born into a solar system with nine planets, we now live in a solar system of eight thanks to the work of Mike Brown five-and-a-half years ago. His discovery led to an international body of astronomers demoting Pluto from a planet to a new category of dwarf planet.

Brown is a professor of planetary astronomy at California Institute of Technology. In 2005, his discovery of a world he initially named Xena was first thought to be the tenth planet.

Brown gave a lecture April 12 at the University of Minnesota. He spoke with The Daily Circuit while he was in town about his thoughts on how Pluto's demotion contributes to today's work in the astronomy field.

TOM'S TAKEAWAY

He discovered what could've been the tenth planet, but didn't support calling it a planet and then killed Pluto.

VIDEO: Michael Brown at THiNK 2011

Before you go...

MPR News is dedicated to bringing you clarity in coverage from our reporters across the state, stories that connect us, and conversations that provide perspectives when we need it most. We rely on your help to do this. Your donation has the power to keep MPR News strong and accessible to all during this crisis and beyond.