http://www.newsweek.com/astronomers-70-rogue-exoplanets-milky-way-breakthrough-discovery-1661865

Astronomers have discovered at least 70 new "rogue" exoplanets wandering the Milky Way unbound to a parent star. Few of these cosmic orphans, with masses similar to the planets of our solar system, had been discovered until now, and this latest batch represents the largest find of such worlds.

Researchers hope the discovery of so many of these freely-drifting planets could help us better understand how they evolve and the processes that divorce them from the planetary system and stars.