单词 | horsehead nebula |
释义 | Horsehead nebulaHorsehead nebula(ˈhɔːsˌhɛd)Horsehead nebulaHorsehead Nebula,dark nebulanebula[Lat.,=mist], in astronomy, observed manifestation of a collection of highly rarefied gas and dust in interstellar space. Prior to the 1960s this term was also applied to bodies later discovered to be galaxies, e.g. ..... Click the link for more information. located in the constellation Orion; designated IC 434 or B 33. It consists of a cloud of nonluminous interstellar matterinterstellar matter, matter in a galaxy between the stars, known also as the interstellar medium. Distribution of Interstellar Matter Compared to the size of an entire galaxy, stars are virtually points, so that the region occupied by the interstellar matter ..... Click the link for more information. resembling the outline of a horse's head and appears against the background of a bright emission nebula. The Horsehead Nebula measures about 4 min of arc at its greatest width. It is located near the belt of Orion at a distance of about 1,600 light-years from the earth. Horsehead nebula(IC 434) A dark nebula in Orion located near the star Zeta (ζ) Orionis. It is seen as a dark distinctively shaped region silhouetted against the bright background of an emission (H II) nebula.Horsehead Nebula[′hȯrs‚hed ′neb·yə·lə] |
随便看 |
|
英语词典包含2567994条英英释义在线翻译词条,基本涵盖了全部常用单词的英英翻译及用法,是英语学习的有利工具。