A nova or supernova is produced when an aging star explodes and flashes up at a luminosity of several billion times that of the sun. In addition to releasing X-rays and high-energy cosmic rays, such an event can also generate nebulas, quasars, and pulsars. These phenomena are important subjects of research on the evolution of heavenly bodies.
所謂的新星與超新星，是恆星演化到晚期，以爆炸結束生命的剎那，發出幾十億個太陽光度總和的能量，爆發過程並輻射 X 射線、高能量宇宙線，與產生膨脹星雲、射電源、脈衝星，是研究天體演化的重要線索。