退行速度的英文
发音:
"退行速度"怎么读用"退行速度"造句
英文翻译手机版
- recessional velocity
- velocity of recession
- "速度"英文翻译 velocity; speed; blast; bat
- "行速度" 英文翻译 : flight airspeed record
- "步行速度" 英文翻译 : walking speed; walking velocity
- "带运行速度" 英文翻译 : tape running speed
- "读行速度" 英文翻译 : reading line rate
- "飞行速度" 英文翻译 : airspeed; flight speed; flight velocity; flying eed; flying speed; speed in free air; speed of flight
- "飞行速度计" 英文翻译 : airspeedometer
- "滚行速度" 英文翻译 : rotate speed
- "航行速度" 英文翻译 : route speed
- "记录行速度" 英文翻译 : recording line rate
- "进行速度" 英文翻译 : pace
- "可航行速度" 英文翻译 : navigable speed
- "可行速度" 英文翻译 : feasible speed
- "旅行速度快" 英文翻译 : make good time
- "慢行速度" 英文翻译 : creep speed
- "爬行速度" 英文翻译 : crawl speed; crawling speed; creeping speed
- "蠕行速度" 英文翻译 : crawl speed; creeping speed
- "运行速度" 英文翻译 : operating speed; running rpm; running speed; service speed; speed of operation; speed of service; traveling speed; travelling speed
- "自行速度" 英文翻译 : self-propelled travelling speed
- "最猩行速度" 英文翻译 : minimum flying speed
- "程序执行速度" 英文翻译 : program execution speed
- "磁带运行速度" 英文翻译 : tape running speed
- "低空飞行速度" 英文翻译 : low-altitude speed
- "飞行速度范围" 英文翻译 : flight speed spectrum
- "飞行速度极限" 英文翻译 : flying speed limit
例句与用法
- From the extent of the red shifts the recession velocities can be computed .
从红移量可以计算退行速度。 - If the redshift is much less than 1 , we can calculate the receding velocity by the following formula
若红移z比1少得多则我们便可用以下公式找出星系的退行速度v : - 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
把数值代入,便可以得出以上例子的星系退行速度为每秒九千公里。 - 513km s mpc , ie , for a celestial object 1 , 000 , 000 parsec away from us , its recession rate is 513km 1 parsec 3 . 26 light years
513 km s mpc ,即一个距离我们一百万秒差距的天体,它的退行速度是每秒513公里一秒差距3 . 26光年。 - 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
,先要测量出天体主要是星系团的退行速度和距离。哈勃本人在1929年给出第一个数值: h - 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
美国天文学家哈勃于1929年发现星系退行速度与其距离存在著正比的关系,即所谓哈勃定律:退行速度v h - 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
利用大爆炸理论亦可以估算宇宙的年,由于我们知道星系的退行速度,只要我们来一个倒镜,计算所有星系回到原点所需的时间,便可得出宇宙的年,结果是大约有150亿年1 . 5x10 - 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
假若星系运动的方向是随机的,那么应该有一半的星系正在远离我们,另一半则接近我们,但结果实在出人意表,哈勃发现不单绝大部分星系正在远离我们,而且它们的退行速度和与地球的距离成正比,这个关系可以下式表示: - 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
有两个主要的误差:第一个是测量退行速度的误差,虽然天文学家利用光谱及多普勒效应,已经很准确地找到个别星系的退行速度,但由于与邻近星系及星系团的引力作用,这个退行速度便不完全是因宇宙膨
其他语种
- 退行速度的阿拉伯语:سرعة إنحسارية;
百科解释
退行速度是天文学上描述天体远离而去的速度,通常是将地球当成静止不动的。
详细百科解释
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