What actually happens inside a supernova?

When a really big star runs out of fuel, it collapses in on itself in less than a second. All that squished energy bounces back out in a giant explosion called a supernova — brighter than a whole galaxy of stars combined! The wildest part: inside that explosion, brand new atoms are made — like gold, silver, and iron. These atoms get scattered across space, and billions of years later, some end up… in you. The iron in your blood was made in a supernova. You are literally made of star dust! Astronomers just captured the sharpest ever image of one using the James Webb Space Telescope.