Astronomy Picture of the Day——NGC 2170：天使星云

NGC 2170: Angel Nebula Still Life 
Image Credit & Copyright: Juan Lozano de Haro

Explanation: Is this a painting or a photograph? In this classic celestial still life composed with a cosmic brush, dusty nebula NGC 2170, also known as the Angel Nebula, shines near the image center. Reflecting the light of nearby hot stars, NGC 2170 is joined by other bluish reflection nebulae, a red emission region, many dark absorption nebulae, and a backdrop of colorful stars. Like the common household items that still life painters often choose for their subjects, the clouds of gas, dust, and hot stars featured here are also commonly found in this setting -- a massive, star-forming molecular cloud in the constellation of the Unicorn (Monoceros). The giant molecular cloud, Mon R2, is impressively close, estimated to be only 2,400 light-years or so away. At that distance, this canvas would be over 60 light-years across.

NGC 2170：天使星云

这究竟是一幅画还是一张照片？在这幅由宇宙画笔所描绘的经典天体静物画中，被人们称为天使星云的尘埃星云NGC 2170在影像中心附近闪耀。NGC 2170可以反射附近炽热恒星的星光因而显得很亮。影像中还可以发现其他蓝色反射星云、红色发射星云、很多暗吸收星云以及多彩的背景恒星。就像画家经常选择普通家居用品作为题材一样，该特征图像中的气体云、尘埃和炽热恒星也经常出现在麒麟座内的大质量恒星形成分子云中。巨大的分子云Mon R2距离地球非常近，大约只有2400光年。以这个距离来计算，这幅画布的宽度将超过60光年。

高清原图地址：

https://apod.nasa.gov/apod/image/1908/AngelNebula_Lonazo_3291.jpg

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