Scots Engineers Prove Space Pioneer's 25-Year-Old Theory
• arcleinAlthough the displacement distance above or below the equator is small - of the order of 10 to 50 km - work on hybrid solar sails, which use both light pressure and thrust from a conventional electric propulsion system, is underway and aims to improv
Here is an interesting proposal to use a solar sail to prove an Einstein theory:
http://www.space.com/scienceastronomy/solar-sails-einstein-experiment-100726.html