tiānwénxuéjiā / tōngguò / guāncè / fāxiàn / zhè / kē / ǎi xīng / de / liàngdù / zhèngzài / huǎnmàn / biànhuà

天文学家通过观测发现，这颗矮星的亮度正在缓慢变化。

Astronomers discovered through observation that the brightness of this dwarf star is changing slowly.