Pluto debate

Astronomer Larry Cuipik describes the orbit of Pluto and its moon Charon, using models of Earth and the moon at the Adler Planetarium in 2006. The International Astronomical Union declared that Pluto is no longer a planet under new guidelines that downsize the solar system from nine planets to eight.
Chuck Berman, Chicago Tribune
Copyright © 2018, The Baltimore Sun, a Baltimore Sun Media Group publication | Place an Ad