The interstellar cloud of gas and dust is an active star-forming region.

由气体和尘埃组成的星系云是一个恒星形成的活跃区域。

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Reddish nebulae in this image reveal regions of active star formation, where young, hot stars heat up nearby gas clouds.

图中泛红的星云透露出活跃的恒星形成区域，在那里年轻的灼热恒星辐射激发了附近的气体云发光。

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An active galaxy is a star system with a humongous black hole at its centre.

ECONOMIST: Cosmic rays: They came from outer space | The

Star Wars active subscribers recently fell to 1.3 million from 1.7MM despite heavy marketing and the release of two patches, Doshi adds.

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The researchers suggest the clusters they originated from may no longer be active, thus shedding light on the history of star activity in the galactic core.

MSN: Giant gas geysers erupting from Milky Way galaxy