Rick Kang of Friends of Pine Mountain Observatory will offer an overview of the Casini-Huygens mission to Saturn at 1:30 p.m. today at Redmond Public Library.Sent to explore the details of the ringed planet, the Casini-Huygens craft is the most complicated ever launched, according to Kang. Two unmanned robotic explorers will spend several years retrieving and relaying information back to scientists on Earth.Free.Contact: 312-1032.