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Nebulas are dazzling clouds of gas and dust, where stars are born and die. Their glowing beauty has amazed skywatchers for centuries. Here are 25 stunning nebulas and the fascinating stories ...

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4. Helix Nebula (Image credit: NASA/JPL-Caltech/Univ.of Ariz.) The Helix Nebula, located in the constellation Aquarius, is another favorite of amateur astronomers because of its bright colors.

蜘蛛星云 (Spider Nebula) 同样是银河系的居民，蜘蛛星云是一个拥有绿色卷须的恒星形成中心，仿佛宇宙中的一只巨型蜘蛛正在编织星辰之网。 三裂星云 (Trifid Nebula) 发现于1764年的三裂星云，距离我们7000光年，是一个活跃的恒星形成中心。