Gliese 581 System Map

The Gliese 581 planetary system is the gravitationally bound system comprising the star Gliese 581 and the objects that orbit it. The system is known to consist of at least four planets along with a debris disc discovered using the radial velocity method. The system’s notability is due primarily to early exoplanetology discoveries, between 2008 and 2010, of possible terrestrial planets orbiting within its habitable zone and the system’s relatively close proximity to the Solar System at 20 light years away. However, its observation history is controversial due to false detections and conjecture and with the radial velocity method yielding little information about the planets themselves beyond their mass.