Diffractive Solar News Today

For a number of years now NASA’s Innovative Advanced Concepts (NIAC) program has been the driving force behind some of space exploration’s cr...

Long-distance ocean travel began with watercraft using zero-emission propulsion systems. Gigantic sails harnessed the power of the wind. As technology developed, oceangoing craft switched to fossil-fuel-based propulsion. Fascinatingly, spacecraft may be taking the opposite trajectory: Our first rockets traveled through space by burning fuel, but now NASA is