恆星密度 的英文怎麼說

中文拼音 [héngxīngmìdù]
恆星密度 英文
star density
  • 恆 : Ⅰ形容詞1 （永久; 持久） permanent; lasting 2 （平常; 經常） usual; common; constant Ⅱ名詞1 （恆心...
  • 星 : 名詞1 （夜晚天空中閃爍發光的天體） star 2 [天文學] （宇宙間能發射光或反射光的天體） heavenly body...
  • 密 : Ⅰ名詞1 （秘密） secret 2 [紡織] （密度） density 3 （姓氏） a surname Ⅱ形容詞1 （距離近; 空隙小）...
  • 度 : 度動詞[書面語] （推測; 估計） surmise; estimate
  • 恆星 : [天文學] fixed star; star恆星大氣 stellar atmosphere; 恆星導航 star navigation; stellar guidance;...
  1. As the accretion disk feeds more mass into itself, the embryo star contracts, growing ever denser and more massive.

    隨著吸積盤獲得越來越多的物質，胚胎恆星就不斷收縮，密度和質量都變得越來越大。
  2. The star to be moving rapidly, perhaps in an orbit around the densely concentrated stars of the galactic nucleus.

    這顆星看來正在以高速運動著，其運動軌道大概就圍繞著由高度密集的恆星所構成的銀河系核心。
  3. On the bases of the galaxy evolution theory, we use the therotical chemical evolution model of three zone ( such as halo, thick disk and thin isk ) and multi - phase ( diffuse gas, molecular clouds, stars of both low and high mass, the remnants ). by comparing with the observational constraints, such assurface densities, age - metallicity relation, g - dwarf metallicity distribution in the solar neighbourhood and the correlation between [ a / fe ] and [ fe / h ], supernovae rates, infall rates. the rationality of the model is verified. based on the theory model, we calculate the abundance of neutron capture element

    本文正是在銀河系化學演化的基礎上，利用銀河系的三成分（ threezone ） （即暈、厚盤和薄盤）多相（ multi - phase ） （氣體，分子云，大、小質量恆星以及剩餘物質）的化學演化的理論模型，通過與觀測約束（質量面密度、場星的年齡-金屬豐度關系、太陽附近g矮星金屬含量分佈函數、三成份的特徵量、元素的星系化學演化、超新星的爆炸率、內落速率等）的比較，來檢驗模型的合理性。
  4. Topics include : planets, planet formation ; stars, the sun, " normal " stars, star formation ; stellar evolution, supernovae, compact objects ( white dwarfs, neutron stars, and black holes ), plusars, binary x - ray sources ; star clusters, globular and open clusters ; interstellar medium, gas, dust, magnetic fields, cosmic rays ; distance ladder ; galaxies, normal and active galaxies, jets ; gravitational lensing ; large scaling structure ; newtonian cosmology, dynamical expansion and thermal history of the universe ; cosmic microwave background radiation ; big - bang nucleosynthesis

    課程的主題包含了：行星、行星形成；恆星、太陽、正常的恆星、恆星形成；恆星演化、超新星、緻密天體（白矮星、中子星及黑洞） 、波霎、雙x -射線源；星團、球狀及疏散星團；星際介質、氣體、塵埃、磁場、宇宙射線；距離階梯；星系、正常及活躍星系、噴流；重力透鏡；大尺度結構；牛頓宇宙學、宇宙的動力膨脹及溫度發展歷史；宇宙背景微波輻射；大霹靂核合成。
  5. 1 the clouds from which stars are born are as dense as the space around earth

    孕育恆星的星雲的密度和環繞地球的太空的密度是一樣的。
  6. By theory and practice simulation, the several types of constant envelope modulation techniques are analyzed and compared, including theirs modulation principle, phase path, the modulated wave envelope, power spectrums, error bit rate and the influence of its power spectrums of the band - limited and non - linear, etc. especially we have researched the ijf - oqpsk modulation technique, and the performance of its inter - symbol interference and time jitter free, and its strongly resisting of spectral spreading

    結合理論和實驗模擬結果，分析討論了衛星通信中的各種恆包絡調制技術，對它們的調制原理，相位路徑，已調波包絡，功率譜密度，誤碼性能，以及帶限非線性通道對其功率譜的影響等方面都作了研究和比較。特別研究了ijf ? oqpsk在消除碼間干擾和定時抖動方面的性能及其優良的旁瓣特性和抑制頻譜擴展特性。
  7. A star is formed when a cloud of gas collapses from the interstellar medium toward high density.

    一個氣體雲自星際物質中坍縮，密度達到很高時，即形成了一個恆星。
  8. Here light from the nearest stars takes years to reach us, and the density of gas averages about one atom per cubic centimeter

    在這里，來自最近鄰恆星的光需要好幾年才能抵達，而氣體的密度平均而言，大約是每立方公分內有一個原子。
  9. In this theory, bars and spiral arms are waves of excess density, where stars are crowded together temporarily in a cosmic traffic jam

    在這個理論中，棒子與螺旋臂是高密度所形成的波，而在該處恆星蜂擁群集，造成暫時的宇宙交通堵塞。
  10. A consequence of einstein ' s general theory of relativity ? one of the pillars of modern physics ? says that black holes formed by collapsing objects such as stars are so dense that nothing, not even light, can escape their gravitational pull

    愛因斯坦的廣義相對論作為現代物理的支柱理論之一，能通過其得出的一個結論? ?由恆星之類的巨大物體崩塌而形成的黑洞密度大到任何物體都無法逃脫其重力的吸引，連光都不例外。
  11. More recently, dr. rosanne di stefano also from the harvard - smithsonian centre for astrophysics and i used the chandra x - ray observatory to detect objects dubbed " quasisoft " x - ray sources in nearby galaxies because of their low temperatures, which are at most four million degrees celsius. that is well below the temperatures expected for " hard " x - ray sources such as neutron stars or stellar mass black holes - which run between 10 million and 100 million degrees celsius - and still hotter than " soft " x - ray sources like white dwarfs

    最近羅珊迪史提芬路博士她亦來自哈佛大學史密森天體物理中心和筆者利用錢德拉射線天文臺在鄰近星系偵測到一種奇怪的-射線源，我們稱之為類軟射線源，因為它們的溫度最高只有攝氏400萬度，遠低於一般硬射線源，例如中子星和恆星型黑洞溫度介乎攝氏1千萬至1億度，卻又比軟射線源例如白矮星為高。
  12. The morphology of the galaxy is not clear due to the low stellar density and the relatively short distance to the galaxy ( 220, 000 light years )

    形態學的銀河尚不清楚由於低恆星密度和相對距離較遠銀河（ 220 ， 000光年）
  13. Because of its great mass, both the core temperature and density are higher than that of a solar mass star. the nuclear reaction rate is also higher and it produces more energy per second. the star is of spectral type o, b or a

    由於質量更大，恆星核心的密度及溫度亦必然比小質量恆星高，所以熱核反應會以更快速度進行，產生出更多的熱能，恆星會更加光亮，這些恆星通常為o b或a型恆星。
  14. Unlike looking at visible light, the spatial resolution of x - ray optics is not that high in the last two decades. hence, astronomers often do not know the correct identification of those x - ray sources in a crowded region when comparing to optical images

    然而在過去二十年來， x射線探測器的空間解析度始終及不上可見光波段的望遠鏡，因此天文學家往往很難在恆星密布的區域內，證認出究竟是那個天體發射出x射線。
  15. Because of the large mass, after the hydrogen burning, the temperature and pressure of the core is high enough to trigger helium burning to carbon, and a hydrogen burning shell is developed around the core

    由於大質量恆星的核心比一般恆星更熱和有更高的密度，當走至生命盡頭時，核心條件足以把氦繼續轉化為碳，同時在核心外圍形成一個氦殼。
  16. Because of the upper limit of the nuclear density, which prevents the core to compress too far, the collapsing inner core will bounce back outwards. this out - going inner core will collide with the in - coming outer core, which is collapsing rapidly. this collision will send off shock waves and create heavy elements, like uranium

    由於原子核的天然密度會成為巨大的阻力，防止核心進一步收縮，這時核心會猛烈反彈，以極高速塌縮的核心外殼會和反彈中的核心碰撞，產生強烈的沖擊波，同時產生出像鈾等比鐵更重的元素，並把恆星外殼炸毀，這便是
  17. It says that the stars indeed rotate at different speed, but the density of the interstellar medium form a wave. at the wave front, where the density is higher, star formation is enhanced. that is why we find young stars along the spiral arms and old stars elsewhere

    這個理論認為雖然恆星會以不同速度移動，但星際物質的密度會產生波動，在密度最高的波陣面會催生出新的恆星，這解釋了為何通常在旋臂會找到新生恆星，而在其他地方只有古老恆星的原因。
  18. Stellar density function

    恆星密度函數
  19. But despite their low temperatures, these quasisoft objects emitted x - ray signals that are more powerful than expected from simple neutron stars or stellar black holes. instead, the natural model for quasisoft x - ray sources is the one involving an intermediate - mass black hole

    此外，這種類軟天體溫度雖然低，但它們所發出的射線訊號較中子星和恆星型黑洞的為強，我們相信它們和中型黑洞有著密切的關系。
  20. At some point, the density and temperature at the center of the cloud of gas will be high enough to ignite the nuclear fusion. the energy produced by the fusion will create two kinds of outward pressure to act against the gravitational attraction

    隨著恆星不斷收縮，核心氣體的溫度及密度亦不斷上升，直至燃點起熱核反應，所產生的能量會造成兩種向外的壓力，對抗向內的萬有引力。
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