The Crab Nebula, filled with mysterious filaments, is the result of a star that was seen to explode in 1054 AD. In the picture taken recently from a Very Large Telescope, the color indicates what is happening to the electrons in different parts of the Crab Nebula. Red indicates the electrons are recombining with protons to form neutral hydrogen, while blue indicates the electrons are whirling around the magnetic field of the inner nebula. In the nebula's very center lies a pulsar: a neutron star rotating, in this case, 30 times a second. FORS TEAM--8.2 METER VLT--ESO/NASA