What is "sunjammer"

"Sunjammer" is a science fiction short story by Arthur C. Clarke, originally published in 1963, and included in the March 1964 issue of Boys' Life. The story has also been published under the title "The Wind from the Sun" in Clarke's 1972 collection of short stories with this title. It depicts a yacht race between solar sail spacecraft.

Sunjammer (Solar Sail Demonstrator) was a NASA mission intended to demonstrate a solar sail constructed by LGarde, but was cancelled before launch. The largest solar sail made as of 2013, Sunjammer was named after a 1964 Arthur C. Clarke story of the same name, Sunjammer, in which several solar sails compete in a race across the Solar System. Sunjammer was slated to launch in January 2015 as the secondary payload of a SpaceX Falcon 9 rocket, along with the Earth observation satellite DSCOVR. Citing a lack of confidence in its contractor’s ability to deliver, the mission was cancelled in October 2014.