Why there are still huge mysteries in supernova physics

Unknown Physics on the Cosmic Scale? 1000 Supernova Explosions Chart the Expansion History of the Universe

“Oddball Supernova” Appears Strangely Cool Before Exploding – “Stretches What’s Physically Possible!”

Extraterrestrial radioactive isotope found in seabed has implications for Earth's origins. The dating of the sample confirms two or more supernova explosions occurred near Earth. "Our data could be the first evidence that supernovae do indeed produce plutonium-244."