美国人通过哈勃空间望远镜，在人马座发现了一个叫做“回飞棒星云”的地方，那里是宇宙中最冷的地方。
回飞棒星云的膨胀创造了一种宇宙冰箱，使气体维持其异常的寒冷。
The Boomerang Nebula's expansion creates a kind of cosmic refrigerator, allowing the gases to maintain their unusual cool.
然而回飞棒星云的扩张却创建了一种特定类型的宇宙的冷冻器，它能容许气体维持它们原来的异常冷却温度。
But the Boomerang Nebula's expansion creates a kind of cosmic refrigerator, allowing the gases to maintain their unusual cool.
冰寒的回飞棒星云会发光，是因为它尘埃反射了来自中心星的星光，天文学家认为它是正在演化到行星状星云阶段的恒星或恒星系统。
Shining with light from the central star reflected by dust, the frigid Boomerang Nebula is believed to be a star or stellar system evolving toward the planetary nebula phase.
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