They're caused by a rapidly rotating, high-mass star collapsing in on itself.

它是由高速旋转的大质量恒星坍缩的过程中产生的。

Astronomers realized that matter from the rotating star was blown off into orbit around its invisible companion.

天文学家发现，旋转恒星上的物质会被吹到它看不见的伴星的周围轨道上。