Scores of baby stars shrouded by dust are revealed in this infrared image of the star-forming region NGC 2174, as seen by NASA’s Spitzer Space Telescope. Some of the clouds in the region resemble the face of a monkey in visible-light images, hence the nebula’s nickname: the “Monkey Head.” However, in infrared images such as this, the monkey disappears. That’s because different clouds are highlighted in infrared and visible-light images.

这张由NASA斯皮策太空望远镜拍摄的恒星形成区域NGC 2174的红外图像显示了被尘埃笼罩的数十颗新生恒星。该区域的一些云在可见光图像中类似猴子的脸,因此星云的绰号为“猴头”。然而,在这样的红外图像中,猴子消失了。这是因为不同的云在红外线和可见光图像中被突出显示。

Found in the northern reaches of the constellation Orion, NGC 2174 is located around 6,400 light-years away. Columns of dust, slightly to the right of center in the image, are being carved out of the dust by radiation and stellar winds from the hottest young stars recently born in the area.

NGC 2174位于猎户座的北部,距离我们约6400光年。图中稍偏右的尘埃柱,是由最近在该区域诞生的最热的年轻恒星的辐射和恒星风从尘埃中雕刻出来。

Spitzer’s infrared view provides us with a preview of the next clusters of stars that will be born in the coming millennia. The reddish spots of light scattered through the darker filaments are infant stars swaddled by blankets of warm dust. The warm dust glows brightly at infrared wavelengths. Eventually, these stars will pop out of their dusty envelopes and their light will carve away at the dust clouds surrounding them.


In this image first published in 2015, infrared wavelengths have been assigned visible colors we see with our eyes. Light with a wavelength of 3.5 microns is shown in blue, 8.0 microns is green, and 24 microns in red. The greens show the organic molecules in the dust clouds, illuminated by starlight. Reds are caused by the thermal radiation emitted from the very hottest areas of dust.


Areas around the edges that were not observed by Spitzer have been filled in using infrared observations from NASA’s Wide Field Infrared Survey Explorer, or WISE.


Image Credit: NASA/JPL-Caltech


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