The James Webb Space Telescope's (JWST) studied asteroid 2024 YR4 in both visible and thermal light and measuring the space rock to around 200 feet (60 meters) in diameter.

A newly discovered asteroid, 2024 YR4, has jumped to the top of risk lists after triggering automated warnings in December. Experts say the chance of impact in December 2032 has nearly doubled to ...

Shortly after it was discovered, astronomers calculated that the asteroid had a 1-in-83 chance of hitting Earth in 2032 — that's an impact risk of around 1%. Experts urged caution, though noting ...