Is it possible for two planets to share the same orbit?
COURTNEY EVANS, IRVINGTON, NEW JERSEY
It is possible for two objects to share the same orbits, but not the exact same orbit. Saturn's moons Janus and Epimetheus run on orbits that differ in size by only 30 miles (50 km). This similarity results in a surprising interaction: The two moons swap orbits every 4 years.