NGC 6357：大质量恒星的大教堂
(原标题: NGC 6357: Cathedral to Massive Stars)
2025-09-23
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一颗普通恒星的质量是多少？根据距离、亮度和标准太阳模型的估计，疏散星团Pismis 24中的一颗恒星质量是太阳的200多倍，使其成为已知质量最大的恒星之一。这颗恒星是最亮的物体，位于韦伯太空望远镜在红外光下拍摄的特色图像的底部中心附近的中心洞中。为了进行比较，哈勃太空望远镜拍摄的一张翻转图像也以可见光为特色。然而，对这些图像的仔细观察表明，Pismis 24-1的明亮亮度不是来自一颗恒星，而是至少来自三颗恒星。组成恒星的质量仍将接近100个太阳质量，使它们成为目前有记录的质量最大的恒星之一。在图像的底部，恒星仍在相关的发射星云NGC 6357中形成。看起来可能像一座哥特式大教堂，中心附近充满活力的恒星似乎正在冲破并照亮一个壮观的茧。教师与学生：在课堂上运用APOD的想法
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How massive can a normal star be? Estimates made from distance, brightness and standard solar models had given one star in the open cluster Pismis 24 over 200 times the mass of our Sun, making it one of the most massive stars known. This star is the brightest object located in the central cavity near the bottom center of the featured image taken with the Webb Space Telescope in infrared light. For comparison, a rollover image from the Hubble Space Telescope is also featured in visible light. Close inspection of the images, however, has shown that Pismis 24-1 derives its brilliant luminosity not from a single star but from three at least. Component stars would still remain near 100 solar masses, making them among the more massive stars currently on record. Toward the bottom of the image, stars are still forming in the associated emission nebula NGC 6357. Appearing perhaps like a Gothic cathedral, energetic stars near the center appear to be breaking out and illuminating a spectacular cocoon. Teachers & Students: Ideas for Utilizing APOD in the Classroom