For almost 60 years, a global ban on nuclear weapons in space has held up. But the growing number of satellites and increasing geopolitical tension has scientists worried the moratorium could fail

By observing the neutrons induced by spallation from protons in the inner Van Allen radiation belts using widely available sensor technologies, the detection of a thermonuclear…

A nuclear weapon orbiting Earth would emit neutrons through its interactions with the planet’s space radiation environment, and these could be detected by satellites.