Astronomers have discovered the eerie remains of a supernova with an almost perfect spherical shape glowing faintly on the outskirts of the Milky Way. However, they are unsure exactly how large and ...

The shot-down Chinese spy balloon may have had synthetic aperture radar, the Washington Post reports. The technology has the ability to observe objects in the dark or through clouds. SAR is used ...

“We have all the pieces in place,” says German. Will Hvaldimir’s unknown spy mission end with retirement in a fish-filled fjord? Only time will tell. But in the meantime, German notes that ...

Other documents disclose sensitive capabilities, including previously unknown spy satellites and electronic intelligence-gathering that locates Russian and Ukrainian formations by their radio ...

SEOUL, Feb 28 (Reuters) - North Korea's first spy satellite is "alive", space experts ... the spacecraft - although its capabilities remain unknown. After two fiery failures, North Korea ...

Declassified photos captured by United States spy satellites launched during the Cold War have revealed an archaeological treasure trove: hundreds of previously unknown Roman-era forts ...

The low brightness makes it hard to determine Telios' distance from Earth, which also raises uncertainty about its size. The researchers believe it could be anywhere from 7,170 to 25,100 light ...