NGC 300：有恒星和气体云的宇宙宝石
(原标题: NGC 300: A Cosmic Gemstone with Stars and Gas Clouds)
2026-07-16
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这颗闪闪发光的彩色宝石是一个螺旋星系ngc300。它是离地球最近的螺旋星系之一，距离地球只有600万光年。但它真的是这样的吗？这是一个更标准的描述。这张不同寻常的图像结合了来自星系内恒星和尘埃的光，以及来自星际气体电离云的光，显示为红色（硫），绿色（氢）和蓝色（氧）。将红光和绿光以不同的比例组合在一起，就会产生在图像中最明显的黄色或橙色光。来自其他电离气体的光也在霓虹灯、荧光灯管和路灯中起作用。这些巨大的电离气体云通常是由年轻的大质量恒星产生的，这些恒星产生的高能紫外线辐射能够使气体电离。与太阳等较轻的恒星相比，大质量恒星寿命很短，在生命的最后阶段会以超新星的形式爆炸。图像中的一些彩色云可能隐藏着超新星遗迹。
查看原文解释
This sparkling, colorful gemstone is a spiral galaxy, NGC 300. It is one of the closest spiral galaxies to Earth, only about 6 million light-years away. But does it really look like this? Here is a more standard portrait of it. This unusual image combines the light from the stars and dust within the galaxy with the light from ionized clouds of interstellar gas shown in red (Sulphur), green (Hydrogen) and blue (Oxygen). Combining red and green light in different proportions makes yellow or orange light, most visible in the image. Light from other ionized gases is also at work in neon signs, fluorescent tubes and street lights. These massive clouds of ionized gas are typically created by young, massive stars that produce high-energy ultraviolet radiation capable of ionizing the gas. Massive stars are short-lived, compared with lighter stars like our sun, and explode as supernovas at the end of their lives. Some of the colorful clouds in the image could be hiding supernova remnants.
© Team Ciel Austral Text: Cecilia Chirenti (NASA GSFC, UMCP, CRESST II)