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- There is a curious feature in the spectra of spiral galaxies. 在旋渦星系的光譜中有一種奇妙的特征。
- Some are spiral galaxies like the Milky Way and Andromeda. 有些星系和我們的銀河系及仙女座一樣是漩渦星系，
- "Large spiral galaxies like the Milky Way seem to have 2 or 3 per century. “大的螺旋狀的星球像銀河系可能一個(gè)世紀有2或3個(gè)。
- Spiral galaxies are considered to be gravitationally bound configurations of stars. 旋渦星系被認為是由恒星組成的引力束縛系統。
- Spiral galaxies contain both young and old stars. In general, they are brighter than elliptical galaxies. 旋渦星系同時(shí)擁有年老和年青的恒星,它們通常比橢圓星系光。
- Orbital velocities in spiral galaxies, instead of declining with increasing distance from the galactic center, flatten out to a constant value, as predicted by MOND. 螺旋星系中的軌道速度并不會(huì )隨著(zhù)離開(kāi)星系中心的距離增加而不停降低，它會(huì )平緩下來(lái)成為一固定值。
- A similar effect flattens the debris disks around stars and the gaseous disks of spiral galaxies. 類(lèi)似的效應也會(huì )出現在恒星周?chē)臍堚疟P(pán)，以及螺旋星系周?chē)臍怏w圓盤(pán)上。
- Smaller groups of stars called globular clusters often surround spiral galaxies. 稱(chēng)作球狀星團的小型恒星團體經(jīng)常環(huán)繞在旋渦星系周?chē)?/li>
- Spiral galaxies NGC 5426 and NGC 5427 are passing dangerously close to each other, but each is likely to survive this collision. 螺旋星系 NGC 5426 和 NGC 5427 正危險地擦身而過(guò)，但它們在這次碰撞后應該都能幸存。
- Because gas constitutes only a few percent of the mass of spiral galaxies, modelers had neglected it to make the simulations more tractable. 由于氣體只占螺旋星系質(zhì)量幾個(gè)百分點(diǎn)，研究人員為使模擬較容易處理而將之省略。
- Caption:: This illustration shows two spiral galaxies - each with supermassive black holes at their center - as they are about to collide. 這插圖是畫(huà)家筆下，兩個(gè)螺旋星系相撞時(shí)的情形。
- Grand spiral galaxies often seem to get all the glory, flaunting their young, bright, blue star clusters in beautiful, symmetric spiral arms. 大螺旋星系似乎擁有所有的榮耀，不斷炫耀他們對稱(chēng)旋臂中藍色星團的年輕，明亮，及美麗。
- Yet, high resolution images, using Hubble Space Telescope reveal that many bulges have properties that are more like spiral galaxies. 然而，在高解析度的影像下，使用哈柏太空望遠鏡揭露出許多球核也具有與螺旋星系相同的特性。
- The amount of angular momentum imparted to protogalaxies in the models is comparable to the angular momentum that we actually see in spiral galaxies. 模型中原星系所得到的角動(dòng)量，大小與實(shí)際上在螺旋星系里看到的差不多。
- At least some elliptical galaxies, as well as the bulges and halos of spiral galaxies, may have arisen from such collisions. 至少螺旋星系的核球與暈，以及某些橢圓星系，可能是由此種碰撞產(chǎn)生的。
- Current thinking about how spiral galaxies form trac es back to an idea nearly 2 millennia old, to 2nd-century Egyptian mathematician Ptolemy. 有關(guān)漩渦星系形成的公認觀(guān)念可以追溯到近2,000年以前、公元二世紀時(shí)埃及數學(xué)家托勒密提出的一個(gè)觀(guān)點(diǎn)。
- Through the optical telescope, NGC 6240 is shaped like a butterfly. It is so odd-looking because it is in fact the result of the collision of two spiral galaxies. 以光學(xué)觀(guān)測,NGC 6240的形狀就像一只蝴蝶,它之所以這樣古怪,是因為它其實(shí)是兩個(gè)旋渦狀星系撞的結果。
- In our own Milky Way, which is quite typical of nearby, massive spiral galaxies, the number of observed high-mass stars indicates that stars are forming at a rate of a few solar masses a year. 銀河系可說(shuō)是我們周遭大質(zhì)量螺旋星系的典型，根據觀(guān)測到的大質(zhì)量恒星數目判斷，銀河系的恒星形成率為每年數個(gè)太陽(yáng)質(zhì)量。
- The mystery arises when one considers how a spiral galaxy rotates. 當人們考慮旋渦星系是如何轉動(dòng)的時(shí)候難題就來(lái)了。
- Billows of cosmic dust swirl amid NGC 1316, a giant elliptical galaxy formed billions of years ago when two spiral galaxies merged. 幾十億年之前,兩個(gè)漩渦星系合并成一個(gè)橢圓星系NGC 1316,宇宙塵埃在它的內部翻滾。
