👉 Novae, also known as supernova remnants, are remnants of a star's death. They are formed when a star has exhausted its hydrogen fuel and runs out of oxygen to create nuclear fusion reactions in its core. The resulting explosion is a massive explosion that produces high-energy radiation, including gamma rays. These explosions occur on the outer edges of the galaxy, where they can be visible with telescopes. The most famous example of a supernova is the 1987爆发的 nova (
