supernova
🇺🇸
/ˈsuːpərnəʊvə/
🇬🇧
/ˈsuːpənəʊvə/
A massive star that explodes and briefly becomes extremely bright before fading away.
The scientists studied the remnants of a supernova that occurred millions of years ago.
科学者たちは何百万年前に起こったスーパーノヴァの遺跡を研究しました。