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。

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

youdao

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。

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

youdao