M17 Omega Nebula
（重定向自Horseshoe Nebula）
M17（NGC 6618）是天空中最明亮的发射星云之一，它也叫天鹅星云或Ω星云。这是因为其中最明亮的一部分让人想起在湖面游动的一只天鹅的身体。用一架8英寸（20厘米）或更大的望远镜装上星云滤光器可以去除几乎充满这个区域的较暗的星云状物质。用双筒望远镜卡一很容易看见它。它位于人马座。
Horseshoe Nebula
中文百科
英语百科
Omega Nebula M17
（重定向自Horseshoe Nebula）
2000.jpg)
The Omega Nebula, also known as the Swan Nebula, Checkmark Nebula, and the Horseshoe Nebula (catalogued as Messier 17 or M17) is an H II region in the constellation Sagittarius. It was discovered by Philippe Loys de Chéseaux in 1745. Charles Messier catalogued it in 1764. It is located in the rich starfields of the Sagittarius area of the Milky Way.
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