Solar Sails are the Future of Space Travel One of the biggest challenges facing space exploration is propulsion. Our main go-to, rocket fuel, is heavy, expensive, and can easily run out during travel. Fortunately, the solution might come in the form of solar sails. Facebook Prev Article Next Article Space Checkout these cool gadgets... Related Posts Water on Ganymede, and NASA Needs Your Help How Do We Find Dark Matter? Voyager Leaves the Solar System Colonizing Venus with Giant Balloons Here’s How We Could Reach Mars In Just 30 Minutes What Is Antimatter And Why Are We Searching For It?