The prolonged death of light from type Ia supernovae

Three years after its explosion, a type Ia supernova continues to shine brighter than expected, new research finds. The observations suggest that the powerful explosions produce an abundance of a heavy form of cobalt that gives the heat from nuclear decay an extra energy boost. The work could help pinpoint the parents of type Ia supernovae — a stellar explosion frequently used to measure distances to faraway galaxies — and reveal the mechanics behind these explosions. —> Read More