Solar Sails and Comet Tails: How Sunlight Pushes Stuff Around

It seems crazy, but light actually exerts a physical force on objects. It could power a new generation of spacecraft for deep-space missions.

Solar Sails and Comet Tails: How Sunlight Pushes Stuff Around
It seems crazy, but light actually exerts a physical force on objects. It could power a new generation of spacecraft for deep-space missions.