矮星

dāng héng xīng tā xiàn shí tā huì biàn chéng bái ǎi xīng

当恒星塌陷时，它会变成白矮星。

When a star collapses, it will be white dwarf.

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矮星是一种低发光度的恒星。

Dwarf stars are stars of low luminosity.