Star ‘Stripped to the Bone’, Antarctic Sea Ice Alarm, and Brain Aging Reversed – Science News Roundup (Aug 20–21, 2025)
Astronomers reported a rare supernova, SN 2021yfj, that exposed a star’s silicon and sulfur core after shedding its outer layers, according to a study in Nature. NASA’s James Webb Space Telescope discovered a new, faint inner moon at Uranus, raising the planet’s moon count to 29. NASA and IBM launched an AI model, Surya, that predicts solar flares up to two hours ahead, outperforming previous methods by 16%.