A new analysis from NASA using the Hubble Space Telescope shows that the Crab Nebula, the remnant of a supernova recorded in 1054, is still rapidly expanding, offering rare, direct evidence that the ...

On July 4, 1054, a supernova explosion occurred, marking the death of a star thought to be nine to 11 times more massive than ...

It measures about 15 miles (25 kilometres) in diameter and rotates 11 times every second, faster than a helicopter rotor.