星系天文 的英文怎麼說
中文拼音 [xīngxìtiānwén]
星系天文
英文
extragalactic astronomy-
In the early 1970s, astronomers alar and jun toomre predicted that the odd shape of two relatively nearby galaxies, dubbed the mice after their rodent - like tails, could be explained by a fantastic collision between them
在二十世紀七十年代早期，天文學家艾拉和裘利?圖木爾就曾預言那兩個因為有像嚙齒動物一樣的尾巴而被別稱為「老鼠」的相對較近的星系的奇怪形狀可以用發生在兩者之間的奇怪的撞擊來解釋。At ancient times, people were navigated by means of sun, fixed stars, etc., while currently the common navigation systems are astronomic navigation, inertial navigation and radio navigation
以前，人們主要利用太陽、星星等自然天體。現在人們利用的導航系統主要有：天文導航系統、慣性導航系統、無線電導航系統三大類。It is quite dynamic in itself and also in concent with all of the other galaxies astronomers have so far detected.
它本身是相當活動的，而且與天文學家迄今探測到的所有別的星系一致。With some 50 extrasolar planets under their belt astronomers have to announce something really strange to get anyone ' s attention. last week they did just that
現在天文學家已經在太陽系之外發現了50多顆行星，他們只有發現一些真正奇怪的東西才能吸引人們的注意力。On february 23, 1987, astronomers got the next best thing : a supernova in one of the milky way ' s satellite galaxies, the large magellanic cloud
在1987年2月23日，天文學家獲得了次佳的機會：銀河系的衛星星系大麥哲倫雲中，發生了一次超新星爆發。In late august 2006, the international astronomical union passed a resolution to strip pluto s planetary status. there are now officially only eight planets in our solar system together with other small members, including asteroids, comets, dwarf planets and trans - neptunian objects
自2006年8月底，國際天文聯會議決將冥王星的行星地位?奪之後，太陽系只剩下八大行星及其他的細小成員，其中包括小行星彗星矮行星和海王星外天體等。Astronomers are using radio telescopes to listen for the signals from civilizations that they believe exist on thousands of planets throughout our galaxy.
天文學家們正在用射電望遠鏡探尋他們認為存在於我們星系中的千萬顆行星上的文明世界發來的信號。In astronomical coordinates ( reference mark is north latitude 43. 9 ), analyzed is the effect of azimuth angular velocity, acceleration and altitude angular velocity, acceleration etc. some formulae were given to compute all correlative quantities. with regard to the course of data processing beforehand, the thesis focuses on outliers eliminating technology because of outlier increasing acutely of high - elevation tracking ( approaches 10 - 20 % )
在觀測坐標系中推導出確定天頂盲區理論范圍公式和滿足過天項跟蹤條件的關系式；在天文坐標系中以長春衛星觀測站（北緯43 . 9 ）作為計算基準，分別討論了方位、俯仰方向的角速度、角加速度等對天頂盲區的影響，在理論分析上為解決過天頂跟蹤問題打下了基礎。The evolution course of chinese solid rocket propulsion technology for space missions since 1950s is presented. the technical features, development process, ground tests and flight records of nine typical solid motors are described. these motors were developed for sounding rockets, upper stages of launch vehicles and orbit transfer systems in application satellites respectively. the evolution of basic technology of chinese solid rocket motors and future developing concept are briefly introduced. the information in the paper are all based on the published literatures
敘述了20世紀50年代以來中國航天固體火箭推進技術的發展歷程，介紹了9種最具代表性的固體火箭發動機的技術特徵、研製過程、地面試驗和飛行情況，這些發動機分別應用於中國的探空火箭、運載火箭上面級和應用衛星變軌系統.文中還簡要地評述了中國固體推進各單項技術的發展水平Abstract : the evolution course of chinese solid rocket propulsion technology for space missions since 1950s is presented. the technical features, development process, ground tests and flight records of nine typical solid motors are described. these motors were developed for sounding rockets, upper stages of launch vehicles and orbit transfer systems in application satellites respectively. the evolution of basic technology of chinese solid rocket motors and future developing concept are briefly introduced. the information in the paper are all based on the published literatures
文摘:敘述了20世紀50年代以來中國航天固體火箭推進技術的發展歷程，介紹了9種最具代表性的固體火箭發動機的技術特徵、研製過程、地面試驗和飛行情況，這些發動機分別應用於中國的探空火箭、運載火箭上面級和應用衛星變軌系統.文中還簡要地評述了中國固體推進各單項技術的發展水平This great observatories view of the famous sombrero galaxy was made using nasa ' s chandra x - ray observatory, hubble space telescope and spitzer space telescope
這張著名草帽星系的照片是nasa的錢德拉x射線天文臺、哈勃太空望遠鏡與斯必澤太空望遠鏡大這3架大天文臺所見的圖景。By observing the energy band of hard x - ray, people not only can expand a series of studies to celestial bodies or phenomena of nova and supernova ' s breaking out, nucleus ' s compose, but also many interactional process of thermal braking radiation, synchronal radiation
硬x射能區的天文觀測一方面可以研究一系列的天體目標或超新星和新星的爆發、核合成等現象，另一方面也可以研究一系列的相互作用的過程：熱韌致輻射、同步輻射等。A village of southeast louisiana on the mississippi river west - northwest of new orleans. it is a trade center in a truck farm and sugar cane area. population, 16, 112
拉普拉斯，皮爾?西蒙?德1749 1827法國數學家和天文學家，以其關于太陽系起源和星雲假說的理論及對行星的引力和穩定性調查而著名To further facilitate the progress of the project, a hong kong cnsatm committee was set up in march 2000. chaired by cad, the committee comprises representatives from the international air transport association ( iata ), international federation of air line pilots associations ( ifalpa ), cpa, hong kong observatory and telecommunications services providers
為進一步推展上述計劃，由民航處領導的香港衛星通訊、導航及監察系統航空交通管理系統委員會於二零零零年三月成立，其他成員來自國際民航運輸協會、國際航空公司飛行員協會、國泰航空公司、香港天文臺和電訊服務機構。Astronomers have confirmed that apart from the asteroid belt, there is a kuiper belt region composed of a vast population of small bodies extending 30 to 100 au away from the sun
天文學家證實，太陽系除了有小行星帶外，也有一條稱為凱伯帶的天體帶。But here we come up against the most difficult of all obstacles to contact with people on other planets - - the astronomical distances which separate us
然而，在和外星人聯系中我們遇到的最大困難是分隔我們的天文距離。Modern astronomers, gazing at stars and galaxies far away from the earth, can reconstruct what occurred only minutes after the creation of the universe, billions of years ago.
現代天文學家凝望著遠離地球的星體，星系，從而領悟出數十億年之前宇宙誕生后的短短幾分鐘內發生了哪些現象。M100 is a member of the huge virgo cluster of an estimated 2, 500 galaxies
M100是室女座中2500個河外星系（據估計）中的一個，該星系天文業余愛好者可觀測。By making use of this relationship, astronomers can turn cepheids into celestial yardsticks of the universe, enabling us to easily map the position of galaxies within 100 million light - years
利用這個簡單關系，天文學家使造父變星成了宇宙間的里程碑，讓我們可輕易給那些動輒遠達數千萬光年的星系定位。The branch of astronomy that deals with the planets, satellites, and meteors of the solar system
行星學天文學的一個分支，研究太陽系中的行星、衛星和流星分享友人