100 Billion Planets

An international team of scientists estimates there are over one hundred billion planets in the Milky Way galaxy.

“There’s at least 100 billion planets in the galaxy—just our galaxy,” says John Johnson, assistant professor of planetary astronomy at Caltech and coauthor of the study, which was recently accepted for publication in the Astrophysical Journal. “That’s mind-boggling.”

Read the full news release at Caltech.