How hot can a supernova be in Celsius?

Answer 1

A supernova can reach temperatures of around 10 billion degrees Celsius during the explosion. This extreme heat is produced by the rapid fusion of elements and the release of vast amounts of energy. Such temperatures are far beyond those found in typical stars, making supernovae some of the hottest phenomena in the universe. After the explosion, the remnants can still remain incredibly hot, often exceeding millions of degrees.