About 1000 years ago, Chinese astronomers found a star bright enough to be seen in daytime. That supernova faded, leaving behind a tiny pulsing neutron star surrounded by the gas cloud of the former giant star; what today we see as the Crab Nebula.
Entries in Crab (6)
A Portuguese scientific team has developed special pyjamas using a smart material derived from crab shells that they say can actively treat the symptoms of eczema. Jim Drury reports.
Explanation: This is the mess that is left when a star explodes. The Crab Nebula, the result of a supernova seen in 1054 AD, is filled with mysterious filaments. The filaments are not only tremendously complex, but appear to have less mass than expelled in the original supernova and a higher speed than expected from a free explosion. The above image, taken by the Hubble Space Telescope, is presented in three colors chosen for scientific interest. The Crab Nebula spans about 10 light-years. In the nebula's very center lies a pulsar: a neutron star as massive as the Sun but with only the size of a small town. The Crab Pulsar rotates about 30 times each second.
China's Yangcheng Lake hairy crab farmers resort to tagging their crabs, to fight the flood of ''fake'' crustaceans being passed off as genuine Yangcheng crabs. Arnold Gay reports.
The famous Crab Nebula supernova remnant has erupted in an enormous flare five times more powerful than any previously seen from the object. The outburst was first detected by NASA's Fermi Gamma-ray Space Telescope on April 12 and lasted six days.