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a supernova + verb
supernova 是可数名词，指整个爆发过程；单数前通常加 a/an。
A supernova explodes when a massive star runs out of fuel.
当一颗大质量恒星耗尽燃料时，超新星就会爆炸。
超新星
supernovas — plural of supernova
先理解核心含义，再看它在真实句子里的用法。
超新星
supernova
A supernova explodes when a massive star runs out of fuel.
当一颗大质量恒星耗尽燃料时，超新星就会爆炸。
大质量恒星发生的强烈明亮爆炸,之后变成中子星或黑洞,或被摧毁。
A powerful and bright explosion of a massive star, which afterwards becomes a neutron star or a black hole, or is destroyed.
耀眼的事物。
Something brilliant.
Astronomers detected a supernova in a distant galaxy last night.
天文学家昨晚在遥远的星系中探测到一颗超新星。
The supernova was brighter than the entire galaxy for several weeks.
那颗超新星在数周内比整个星系还亮。
Scientists study supernovas to understand how heavy elements are formed.
科学家研究超新星，以了解重元素是如何形成的。
supernova 是可数名词，指整个爆发过程；单数前通常加 a/an。
A supernova explodes when a massive star runs out of fuel.
当一颗大质量恒星耗尽燃料时，超新星就会爆炸。
become 后接名词作表语，表示“变成……”。
Astronomers think the star will become a supernova in a few thousand years.
天文学家认为这颗恒星将在几千年后变成一颗超新星。
supernova 可直接放在名词前作定语，如 supernova explosion。
The supernova explosion was visible from Earth for months.
那次超新星爆炸持续几个月都能从地球上看到。
Not this
Supernova is a star that explodes.
Use this
A supernova is a star that explodes.
supernova 是可数名词单数，在英语中，可数名词单数不能裸用，前面必须有 a/an 或 the。中文没有冠词，学习者容易漏掉 a；此处表示“一颗超新星”，所以要说 a supernova。
Not this
Astronomers have discovered many supernova in this galaxy.
Use this
Astronomers have discovered many supernovas in this galaxy.
supernova 是可数名词，在 many 之后要用复数形式。标准复数形式是 supernovas（也可写为 supernovae）；写成 many supernova 等于把它当作不可数名词或不加复数标记，不符合语法。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
超新星爆发
The supernova explosion was visible to the naked eye for several nights.
这次超新星爆发连续几个晚上都能用肉眼看到。
超新星遗迹
The supernova remnant emits strong radio waves.
这团超新星遗迹会发出强烈的无线电波。
Ia型超新星
A Type Ia supernova is used as a standard candle in cosmology.
Ia型超新星在宇宙学中被用作标准烛光。
核坍缩超新星
A core-collapse supernova signals the death of a massive star.
核坍缩超新星意味着一颗大质量恒星的死亡。
成为超新星
A star can go supernova when it runs out of fuel.
恒星耗尽燃料后可能会成为超新星。
突然爆红；骤然爆发
After the song went viral, the band seemed to go supernova overnight.
歌曲走红后，这支乐队似乎一夜之间突然爆红。
……的强烈爆发
The author's debut novel was a supernova of imagination and skill.
这位作者的首部小说是想象力与技巧的一次强烈爆发。
高光时刻；绚烂瞬间
That last goal was the supernova moment of the entire match.
那粒最后的进球是整场比赛的高光时刻。
Use supernovas naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
把它拆成super（超级）+nova（新星）来记：一颗恒星“超级爆炸”后亮如新星，就是超新星。
语域：neutral 常见场景：astronomy、science news、educational content 该词为天文学术语，日常口语中较少出现，多用于科普文章、新闻报道或学术语境。通常保持中性语气，正式场合也可使用。
nova、ova、Moldova 都含 -ova 且读 /əʊvə/，与 supernova 的 -nova 押韵；注意 larva 拼写也以 -va 结尾，但读 /ˈlɑːvə/，与 /ˈnəʊvə/ 不押韵。
Dictionary facts from ECDICT, WIKTIONARY.