01-30-2017, 08:20 PM
Four planets orbiting a star about 130 light years away have been shown to have their orbits in resonance. The discovery was made over a number of years using the Keck observatory on Mauna Kea to image the planets directly:
http://www.universetoday.com/133087/four...ed-motion/
http://www.universetoday.com/133087/four...ed-motion/

