Gliese press conference

Announcement of the discovery of the lightest exoplanet up until that point, 2009.

Gliese 581 d or Gl 581 d is a proposed extrasolar planetorbiting the starGliese 581 approximately 20 light-years away in the constellation of Libra. It was the third planet claimed in the system and (assuming a six-planet model) the fifth in order from the star.