A pair of European satellites have created the first artificial solar eclipses through precise and fancy formation flying. The result is hours of on-demand totality
A pair of European satellites have created the first artificial solar eclipses through precise and fancy formation flying. The result is hours of on-demand totality
A sleek white aircraft has become the first independently developed jet to break the sound barrier. The XB-1 aircraft accelerated to Mach 1.05 within about