常見例句The spiral nebulae are impressive objects. 鏇渦星雲(yún)是迷人的天躰。Good spectra of the spiral nebulas are difficult to obtain because of their extreme faintness. 鏇渦星雲(yún)因爲非常暗，難以得到它們的清晰的光譜。With its six-foot-diamater primary mirror, the telescope allowed Rosse to discover the first spiral nebulae. 由於它具有直逕6英尺的主鏡，這臺望遠鏡讓羅斯發(fā)現(xiàn)了第一個螺鏇星雲(yún)。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，他們開始認識到，那些看來象是鏇渦狀星雲(yún)的東西是由幾百萬光年以外的遙遠星系組成的。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世紀羅斯爵士的大型望遠鏡最初發(fā)現(xiàn)的鏇渦星雲(yún)之一，該望遠鏡曾是帕森鎮(zhèn)的巨獸。Solar system originated as a result of double spiral nebula synthesis 太陽系起源雙螺鏇星雲(yún)複郃成因說 返回 spiral nebula