Ramjet engine for Mach 5-speeding hypersonic aircraft tested at 1,832°F by Japan
Japan successfully tested a Mach 5 ramjet engine that could power hypersonic aircraft. (Lire plus...)
R&D on Space Solar Power Systems (SSPS)｜JAXA｜Research and Development Directorate
A Space Solar Power System (SSPS) collects solar energy in outer space, converts it into a microwave or laser beam, transmits that energy to Earth, and converts it into electrical power.