A supernova lit up Earth’s sky in 1054 and was visible in daylight. Hubble now shows its glowing remains are still expanding nearly 1,000 years later
NASA’s Hubble Space Telescope images of the Crab Nebula Nearly 1,000 years after people first saw a bright new star appear in the sky, scientists have measured how the remains of that explosion are still expanding today.In July 1054, court astronomers in China recorded a bright “guest star” near Tianguan, now known as Zeta Tauri….