At the end of their lives, huge stars come up short on hydrogen to change over into helium. These stars then begin framing more huge components, for example, carbon and oxygen from the helium. In its last days, a gigantic star transforms silicon into iron. This kind of combination response causes a star to crumple. The star then discharges its external bits in a display of light and vitality called a supernova. A supernova delivers light commonly brighter than the star ever had.
