February 8, 2012
'Ping-Pong' Planets Bounce Between Stars
Andrew Fazekas, National Geographic
A planet in a two-star system can end up in a gravitational ping-pong match that can last for millenia before the planet gets ejected into interstellar space, a new study suggests.
Scientists had previously theorized that gravitational interactions among multiple planets orbiting a star can sometimes cause a world to get ejected from its system, leaving the rogue planet to wander alone.
TAGGED: binary star system, exoplanet