... twin paradox 双生子矛盾 type i supernova 第一型超新星 type ii supernova 第二型超新星 ...
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?第一类超新星
1998 年，美国两个研究小组利用第一类超新星 (type I supernova) 的观测 数据发现，远方的星系都在高速飞离银河系，而且愈远的星系飞离
双语例句
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At times, enough gas builds up for the dwarf to collapse, leading its carbon to fuse nearly instantly and the dwarf to explode in a TypeIsupernova, which can outshine a galaxy for a few months.