mei 222012
 
Captured Planets

  The discovery of planets around other stars has led to the realization that alien solar systems often have bizarre features – at least they seem bizarre to us because they were so unexpected. For example, many systems have giant planets closer to their star than Mercury is to the Sun, while other have the [continue reading]

apr 172012
 
Some Stars Capture Rogue Planets

New research suggests that billions of stars in our galaxy have captured rogue planets that once roamed interstellar space. The nomad worlds, which were kicked out of the star systems in which they formed, occasionally find a new home with a different sun. This finding could explain the existence of some planets that orbit surprisingly [continue reading]