DAVID A. HARDY / SCIENCE PHOTO LIBRARY DAVID A. HARDY / SCIENCE PHOTO LIBRARY
Solar sailing. Artwork of three "solar sail" spacecraft. These spacecraft are powered by the pressure of sunlight on their large sail-like membranes. Each photon of light reflects from the sail, imparting a tiny forward acceleration. This leads to a gradual but continuous acceleration, and very high speeds can be attained.
Model release not required. Property release not required.