| 单词 | spiral nebula |
| 释义 | spiral nebula (once / 120606 pages) n WORD FAMILY spiral nebula: spiral nebulae USAGE EXAMPLESTo test the distance of the spiral nebulae, a class of intrinsically much brighter variable stars was needed to furnish a new standard candle. Carl Sagan, Cosmos(1980) Mr. A. E. Fath thinks that “no spiral nebula investigated has a truly continuous spectrum.” Gore, J. Ellard, Astronomical Curiosities—Facts and...(2012) Whereas, next to the star itself, the spiral nebula is the type object which occurs most frequently. Todd, David Peck, Astronomy: The Science of the Heave...(2012) n a galaxy having a spiral structure; arms containing younger stars spiral out from old stars at the center Syn|Hypo|Hyper spiral galaxy Andromeda galaxy a spiral galaxy in the constellation of Andromeda that is visible to the naked eye extragalactic nebula, galaxy (astronomy) a collection of star systems; any of the billions of systems each having many stars and nebulae and dust |
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