Astronomy Picture of the Day——斯皮策太空望远镜拍摄的洞穴星云
The Cave Nebula in Infrared from Spitzer
Image Credit: NASA, JPL-Caltach, SpitzerSpace Telescope
Explanation: What's happening in and aroundthe Cave Nebula? To help find out, NASA's orbiting Spitzer Space Telescopelooked into this optically-dark star-forming region in four colors of infraredlight. The Cave Nebula, cataloged as Sh2-155, is quite bright in infrared,revealing details not only of internal pillars of gas and dust, but of theilluminating star cluster too - all near the top of the image. The red glowaround the Cave's entrance is created by dust heated by bright young stars. Tothe right is Cepheus B, a star cluster that formed previously from the samecloud of gas and dust. Other interesting stars of Cepheus come to light ininfrared as well, including those illuminating an even younger nebula towardthe image bottom, and a runaway star pushing a bow shock, tinged in red nearthe image center. This region spans about 50 light years and lies about 2,500light years toward the constellation of the King of Aethiopia (Cepheus).
斯皮策太空望远镜在红外光下拍摄的洞穴星云
洞穴星云的内部和周围区域发生了什么？为了寻找答案，NASA的斯皮策太空望远镜以四种颜色的红外光观测了这个在光学下黑暗的恒星形成区。编号为Sh2-155的洞穴星云在红外光下异常明亮，不仅呈现了星云内部的气体和尘埃柱细节，而且还展现了明亮星团的细节，它们都位于这幅图像的顶端附近。这个洞穴入口附近的红色辉光是明亮的年轻恒星照耀尘埃所产生的。该星云的右侧是仙王座B，它是由相同的团气体和尘埃云在更早期形成的星团。仙王座内其他引人注目的恒星也在红外光下可见，包括那些位于影像底部、更加年轻的明亮星云，以及一颗位于影像中央附近、推出一道弓形激波的红色速逃星。该区域的跨度约为50光年，位于仙王座方向，距离地球约2,500光年。
参考文献：
https://apod.nasa.gov/apod/image/1906/CepheusB_Spitzer_14391.jpg
近期文章：
Astronomy Picture of the Day——木星上的深渊