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Also known as the Cygnus Loop, the Veil Nebula now spans nearly 3 degrees or about 6 times the diameter of the full Moon.

面纱星云也被称为天鹅座环，现在的视角跨度近3度，即大约6倍满月的直径。

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The Veil Nebula itself is a large supernova remnant, the expanding debris cloud from the death explosion of a massive star.

面纱星云本身是一个巨大的超新星遗迹，这是巨恒星濒死时爆炸产生的残骸云体，正在不断扩张。

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Steven Mandel trains his 7-inch telescope on a portion of the Veil Nebula, a cloud of gas 1, 600 light-years away.

FORBES: A Star Is Born

Mandel's particular obsession is imaging: using long exposures to make pictures of celestial bodies--like his shot of the Veil Nebula supernova remnant, which cannot be seen merely by gazing through a telescope.

FORBES: A Star Is Born