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
Astronomers used the Hubble Space Telescope to measure the expanding Crab Nebula. New images compared with older ones show gas filaments moving outwards. This ancient stellar explosion's remnant is still actively changing today. The Crab Pulsar at the center continues to power the nebula's glow. Scientists also identified previously unrecognised filament structures within the nebula.
