In a rare "time-critical" decision, the James Webb Space Telescope will study the true size of the "potentially hazardous" asteroid 2024 YR4 twice over the next few months. The asteroid has a roughly 2.

NASA's James Webb Space Telescope will study asteroid 2024 YR4, which has a 2 per cent risk of striking Earth in 2032, up from 1 per cent since its discovery.

Nasa using world’s most powerful telescope to examine asteroid that could smash into Earth - Research should better refine where the asteroid is flying – but also how big it is