“NGC 67”造句，怎么用NGC 67造句

这个星云位于距离地球2000光年的天琴座内，它还有另外两个名字：MessierObject57和NGC 6720。

娇小而微微泛黄的星云NGC 6729环绕在年轻变星南冕座R的周围。

Located about 2,000 light years from Earth in the constellation Lyra, the Ring Nebula is also known as Messier Object 57 and NGC 6720.

Viewed from Earth, NGC 6744 is about two-thirds the size of a full moon, but it's so faint you can't see it without a backyard telescope.

The smaller yellowish nebula (NGC 6729) surrounds young variable star R Coronae Australis.