星系退行 的英文怎麼說

中文拼音 [xīngxìtuìháng]
星系退行 英文
recession of galaxies
  • 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...
  • 系 : 系動詞（打結; 扣） tie; fasten; do up; button up
  • 退 : 動詞1 （向後移動） retreat; draw back; move back 2 （使向後移動） cause to move back; remove; wit...
  • 行 : 行Ⅰ名詞1 （行列） line; row 2 （排行） seniority among brothers and sisters:你行幾? 我行三。where...
  • 星系 : [天文學] galaxy; galact-
  • 退行 : back line feed
  1. The compact version of the plant is essentially composed of a 2 - stage plane - tary extruder, 3 - roll calender, embossing unit, take - off and cooling unit, automatic unwinder for the substrate, pull unit, thickness gauge and control system and automatic winder

    該生產線的緊湊型主要由一個2段行星螺桿擠出機、三輥壓延機、壓花機構、接取和冷卻機構、基材自動退卷機、牽引機構、厚度測量計和控制系統及自動卷取機組成。
  2. Astronomers estimate the speed at which a galaxy is moving away by measuring the galaxy ' s redshift

    天文學家通過測量星系的紅移對其退行的速度進行估算。
  3. Continuing the above example, the galaxy is moving at a speed of about 9000km s away from us, given the speed of light is 3x10

    把數值代入，便可以得出以上例子的星系退行速度為每秒九千公里。
  4. American astronomer edwin hubble in 1929 discovered that the recession rate of galaxies was directly proportional to their distance. this is what we call the hubble s law which defines that v h

    美國天文學家哈勃於1929年發現星系退行速度與其距離存在著正比的關系，即所謂哈勃定律：退行速度v h
  5. From hubble s law, we know that measurement of recession rate of celestial objects mostly clusters of galaxies and distances are the pre - requisites for the search of h

    ，先要測量出天體主要是星系團的退行速度和距離。哈勃本人在1929年給出第一個數值： h
  6. If the redshift is much less than 1, we can calculate the receding velocity by the following formula

    若紅移z比1少得多則我們便可用以下公式找出星系的退行速度v ：
  7. We know how fast the galaxies are receding from us. so, if we run the movie of the universe backward, we can calculate how long it takes for the galaxies to get back together. from this, the age of the universe is about 15 billion years 1. 5 x 10

    利用大爆炸理論亦可以估算宇宙的年，由於我們知道星系的退行速度，只要我們來一個倒鏡，計算所有星系回到原點所需的時間，便可得出宇宙的年，結果是大約有150億年1 . 5x10
  8. M s. if the motions of the galaxies were random, then we would expect that about half of them will recede from us while half of them will be approaching us. however, hubble found that not only most of them are receding from us, but also the receding velocity is directly proportional to the distance away from us

    假若星系運動的方向是隨機的，那麼應該有一半的星系正在遠離我們，另一半則接近我們，但結果實在出人意表，哈勃發現不單絕大部分星系正在遠離我們，而且它們的退行速度和與地球的距離成正比，這個關系可以下式表示：
  9. There are two major errors. the first one is the error occurred in measuring v. although astronomers can locate v of individual galaxy accurately through the spectrum and the doppler s effect, owing to the gravitational pull exerted from neighbouring galaxies and clusters of galaxies, v is not wholly determined by the expansion of the universe

    有兩個主要的誤差：第一個是測量退行速度的誤差，雖然天文學家利用光譜及多普勒效應，已經很準確地找到個別星系的退行速度，但由於與鄰近星系及星系團的引力作用，這個退行速度便不完全是因宇宙膨
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