Supernova Type I

A Type I supernova is a powerful explosion that occurs when a white dwarf star in a binary system accumulates matter from its companion and reaches a critical mass, causing a thermonuclear runaway. This explosion destroys the white dwarf and releases an immense amount of energy, making the star temporarily bright enough to outshine entire galaxies. Unlike other supernovae, Type I supernovae lack hydrogen lines in their spectra, distinguishing them from other types. They are important for measuring cosmic distances and understanding the universe's expansion.