noun Download 🔗Share The explosion of a star, which increases its brightness to typically a billion times that of our sun, though attenuated by the great distance from our sun. Some leave only debris (Type I); others fade to invisibility as neutron stars (Type II). Examples : "Astronomers observed a brilliant supernova in a distant galaxy, temporarily outshining all the other stars around it. " astronomy space physics science phenomena Chat with AIVocabulary GamePractice Reading