spiral nebula

常见例句

The spiral nebulae are impressive objects.
旋涡星云是迷人的天体。
Good spectra of the spiral nebulas are difficult to obtain because of their extreme faintness.
旋涡星云因为非常暗，难以得到它们的清晰的光谱。
With its six-foot-diamater primary mirror, the telescope allowed Rosse to discover the first spiral nebulae.
由于它具有直径6英尺的主镜，这台望远镜让罗斯发现了第一个螺旋星云。
By the 1920s, they began to realize that what appeared as the spiral nebulae consisted of remote stellar systems millions of light-years away.
到了20年代，他们开始认识到，那些看来象是旋涡状星云的东西是由几百万光年以外的遥远星系组成的。
M101 was also one of the original spiral nebulae observed by Lord Rosse's large 19th century telescope, the Leviathan of Parsontown.
M101也是19世纪罗斯爵士的大型望远镜最初发现的旋涡星云之一，该望远镜曾是帕森镇的巨兽。
Solar system originated as a result of double spiral nebula synthesis
太阳系起源双螺旋星云复合成因说