The Flight of the Dragonfly

Blurb

Rocheworld is a science fiction novel by Robert Forward in which he uses a light sail propulsion system to set the crew on an interstellar mission. The spaceship and crew of 20 have to travel 5.9 light-years to the double planet that orbits Barnard's Star, which they call Rocheworld.
Its sequels include Return to Rocheworld, Marooned on Eden, Ocean Under the Ice, and Rescued from Paradise.