The so-called Sedov-Taylor solution (see § Bombs) has become useful in astrophysics. For example, it can be applied to quantify an estimate for the outcome from supernova -explosions. The Sedov-Taylor expansion is also known as the "blast wave" phase, which is an adiabatic expansion phase in the life cycle of supernova. The temperature of the material in a supernova shell decreases with time, but the internal energy of the material is always 72% of E 0, the initial energy released. This is helpful for astrophysicists interested in predicting the behavior of supernova remnants.