MARK GARLICK / SCIENCE PHOTO LIBRARY MARK GARLICK / SCIENCE PHOTO LIBRARY
Solar sail spaceship by Jupiter and Europa (lower right, a Jovian moon), artwork. This theoretical vessel has a large, square thin sail-like membrane for sailing with sunlight. The Sun is reflected in the sail's surface. Pressure accumulates from the reflection of countless photons of light, emitted by stars such as our Sun, and this gradually gives momentum to the spacecraft. The acceleration would be very low but continuous, eventually allowing very high speeds to be attained. This could allow travel to the outer planets.
Model release not required. Property release not required.