On the premise of considering Pauli exclusion principle strictly, we have obtained an exact general formula of multiparticle and multi-hole state densities for any single-particle Hamiltonian.

EDF (a state-owned French firm that wants to build nuclear plants in Britain) puts the size of the hole at 32gw, and E. on, a German competitor, reckons it will be 26gw.

After the outburst, however, the black hole entered another relatively dim state, but was still about ten times brighter on average than prior to 2006.