The four planets of the Kepler-223 star system appeared to have little in common with the planets of our own solar system today. But a new study using data from NASA's Kepler space telescope suggests a possible commonality in the distant past. The Kepler-223 planets orbit their star in the same configuration that Jupiter, Saturn, Uranus and Neptune may have had in the early history of our solar system, before migrating to their current locations.
Jet Propulsion Laboratory, Pasadena, Calif.
NASA Ames Research Center, Moffett Field, Calif.
Written by Steve Koppes
University of Chicago