Hence, it is rare that an open cluster survives long enough for one of its members to form a planetary nebula.
因此，一个疏散星团很少能够存活到它内部的某个成员变成行星状星云。
Partly obscured by foreground dust, the nebula itself surrounds NGC 1893, a young galactic cluster of stars that energizes the glowing gas.
这片星云本身环绕着部分被前景上的星尘所掩盖了的NGC 1893，这是一个年轻的恒星星系群，它给发光的气体提供了能量。
The center of the Rosette Nebula, which glows with the red light of ionized hyrdorgen, is fueled by a central cluster of powerful giant stars.
一群强大的巨型恒星点燃蔷薇星云的中心，来自电离氢的红光使其绚丽夺目。
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