ngc1566：来自韦伯和哈勃的螺旋星系
(原标题: NGC 1566: A Spiral Galaxy from Webb and Hubble)
2024-02-06
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这个星系有什么不同？非常少，这使得西班牙舞者星系NGC 1566成为天空中最典型、最上镜的螺旋星系之一。然而，这张星系图像有些不同，因为它是两张图像的对角线组合：一张是哈勃太空望远镜在左上角拍摄的，另一张是詹姆斯韦伯太空望远镜在右下角拍摄的。哈勃望远镜的照片是在紫外线下拍摄的，突出显示了银河系令人印象深刻的旋臂上明亮的蓝色恒星和黑暗尘埃的位置。相比之下，韦伯的图像是在红外光和高光下拍摄的，同样的尘埃发出的光比吸收的光多。在翻转图像中，这些图像的另外两个侧面被显示出来。在这两幅图像之间的闪烁显示出哪些恒星特别热，因为它们在紫外线下发出更亮的光，以及看似空洞的空间和红外发光的尘埃之间的区别。图像处理的机会：以美国宇航局的天文摄影挑战赛为例
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What's different about this galaxy? Very little, which makes the Spanish Dancer galaxy, NGC 1566, one of the most typical and photogenic spirals on the sky. There is something different about this galaxy image, though, because it is a diagonal combination of two images: one by the Hubble Space Telescope on the upper left, and the other by the James Webb Space Telescope on the lower right. The Hubble image was taken in ultraviolet light and highlights the locations of bright blue stars and dark dust along the galaxy's impressive spiral arms. In contrast, the Webb image was taken in infrared light and highlights where the same dust emits more light than it absorbed. In the rollover image, the other two sides of these images are revealed. Blinking between the two images shows which stars are particularly hot because they glow brighter in ultraviolet light, and the difference between seemingly empty space and infrared-glowing dust. Image Crunching Opportunity: Take NASA's Astrophoto Challenge
© NASA, ESA, CSA, STScI, J. Lee (STScI), T. Williams (Oxford), R. Chandar (UToledo), D. Calzetti (UMass), PHANGS Team