The 75-meter-high steel structure hosting systems for testing space-based solar power, at Xidian University in Xi'an, north China. Credit: Xidian University HELSINKI — China’s Xidian University has ...

Gravity, electromagnetism, the strong nuclear force, the weak nuclear force. For decades, physicists have recognized exactly four fundamental forces governing everything from atomic nuclei to the ...

NASA engineers and their industry partners are preparing to test two 20-meter (66-feet) long solar sail propulsion system designs — a critical milestone in development of a unique propulsion ...

A research team at Xidian University in China announced it has successfully tested technology that would enable a space-based solar power plant that could transmit energy to Earth, akin to similar ...