河外星系特写: NGC 6744

2022年11月25日

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NGC 6744: Extragalactic Close-Up
Image Credit:
NASA, ESA, and the LEGUS team

Explanation: Beautiful spiral galaxy NGC 6744 is nearly 175,000 light-years across. That’s larger than the Milky Way. It lies some 30 million light-years distant in the southern constellation Pavo, with its galactic disk tilted towards our line of sight. This Hubble close-up of the nearby island universe spans about 24,000 light-years or so across NGC 6744’s central region. The Hubble view combines visible light and ultraviolet image data. The giant galaxy’s yellowish core is dominated by the visible light from old, cool stars. Beyond the core are star-forming regions and young star clusters scattered along the inner spiral arms. NGC 6744’s young star clusters are bright at ultraviolet wavelengths, shown in blue and magenta hues. Spiky stars scattered around the frame are foreground stars and well within our own Milky Way.

Tomorrow’s picture: light-weekend</p>


河外星系特写: NGC 6744
图像提供:
NASA,ESA,and the LEGUS team

说明: 美丽的螺旋星系NGC 6744,跨幅将近有175,000光年,比我们的银河系大。它位在南天孔雀座方向约3千万光年远之处,其盘面向我们的视线方向倾斜。这幅哈勃望远镜为这个邻近星系所拍摄、整合了可见光及紫外光数据的特写图像,呈现了NGC 6744核心约24,000光年宽的区域。此庞然星系的泛黄星系核,主要是受到年老低温恒星所发出的可见光之渲染。星系核外的内螺旋臂上,则散布着许多恒星形成区及年轻星团。在以蓝色及紫红色显示的紫外光波段里,NGC 6744的年轻星团非常明亮。而分布在图像各处的带芒恒星,皆近在我们的银河系之内。

明日的图片: light-weekend

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