Researchers reporte in Nature last month ten newly discovered exoplanets that appear to be very distant from their stars, or not orbiting them at all.

Read, or listen to, the NPR interview with astronomer Joachim Wambsganss and planetary scientist Sara Seager about whether such planets could support life, and how they can disocver them with swarms of miniature satellite telescopes.

http://www.npr.org/2011/05/20/136501172/exoplanets-floating-freely-without-a-star