It looks like you're using an Ad Blocker.
Please white-list or disable AboveTopSecret.com in your ad-blocking tool.
Some features of ATS will be disabled while you continue to use an ad-blocker.
Hawking's solar sail.
Konstantin Tsiolkovsky first proposed using the pressure of sunlight to propel spacecraft through space and suggested, ‘using tremendous mirrors of very thin sheets to utilize the pressure of sunlight to attain cosmic velocities.’ Friedrich Zander (Tsander) published a technical paper in 1925 that included technical analysis of solar sailing. Zander wrote of "using tremendous mirrors of very thin sheets" and "using the pressure of sunlight to attain cosmic velocities".
I think self contained Space Arks will be feasible in the future.