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The complex nebula is thought to be a supernova remnant over a million years old, sprawling across the southern constellations Vela and Puppis. 這個形狀復(fù)雜的星云區(qū)域分布在南天的船帆座和船尾座之間，它被認為是一個超新星殘骸已經(jīng)有一百萬年齡。