NGC 300：一个恒星星系
(原标题: NGC 300: A Galaxy of Stars)
2024-12-02
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这个星系很不寻常，因为你似乎能看到这么多的恒星。在这张螺旋星系NGC 300的深曝光中，恒星是如此的丰富，因为这些恒星中的许多都是明亮的蓝色，并被分成可分辨的明亮星团。此外，NGC 300之所以如此清晰，是因为它是距离地球最近的螺旋星系之一，光只需要大约600万年就能到达这里。当然，星系是由更多暗淡的恒星组成的，而不是明亮的恒星，甚至一个星系的质量更多是由看不见的暗物质组成的。NGC 300横跨的天空几乎和满月一样大，用小型望远镜向南的雕刻家星座方向望去就能看到。这张特色图片是10月份在智利的里约热内卢Hurtado拍摄的，经过20多个小时的曝光合成而成。
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This galaxy is unusual for how many stars it seems that you can see. Stars are so abundantly evident in this deep exposure of the spiral galaxy NGC 300 because so many of these stars are bright blue and grouped into resolvable bright star clusters. Additionally, NGC 300 is so clear because it is one of the closest spiral galaxies to Earth, as light takes only about 6 million years to get here. Of course, galaxies are composed of many more faint stars than bright, and even more of a galaxy's mass is attributed to unseen dark matter. NGC 300 spans nearly the same amount of sky as the full moon and is visible with a small telescope toward the southern constellation of the Sculptor. The featured image was captured in October from Rio Hurtado, Chile and is a composite of over 20 hours of exposure.
© Daniel Stern