spiral galaxies 中文意思是什麼
spiral galaxies
解釋
螺旋狀星系-
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徵。 -
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並不會隨著離開星系中心的距離增加而不停降低，它會平緩下來成為一固定值。 -
Spiral galaxies are considered to be gravitationally bound configurations of stars.
旋渦星系被認為是由恆星組成的引力束縛系統。 -
But almost all spiral galaxies are much older than 2 billion years
但是幾乎所有旋渦星系的年齡都超過了20億年。 -
New stars are constantly forming out of gas and dust in spiral galaxies
在旋渦星系中不斷由氣體和塵埃形成新的恆星。 -
Smaller groups of stars called globular clusters often surround spiral galaxies
稱作球狀星團的小型恆星團體經常環繞在旋渦星系周圍。 -
Elliptical galaxies do not take on the flat - disk or spiral shapes that most galaxies do
橢圓星系並不具有大多數星系具有的扁圓或是螺旋型的形狀。 -
Spiral galaxies contain both young and old stars. in general, they are brighter than elliptical galaxies
：旋渦星系同時擁有年老和年青的恆星，它們通常比橢圓星系光。 -
The largest disks are spiral galaxies such as our own milky way, which stretches more than 100, 000 light - years across
最大的圓盤是像銀河系般的螺旋星系，可橫亙延伸遠超過10萬光年。 -
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生的。 -
That might happen during the collision of two spiral galaxies, which have lots of spare gas available for making new stars
這種情況很可能發生在兩個螺旋星系碰撞時，因為這會剩下大量的氣體，可供製造新的恆星。 -
Because gas constitutes only a few percent of the mass of spiral galaxies, modelers had neglected it to make the simulations more tractable
由於氣體只佔螺旋星系質量幾個百分點，研究人員為使模擬較容易處理而將之省略。 -
Collisions also can transform the shape of galaxies involved ; specifically, the merger of two spiral galaxies may produce a single elliptical galaxy
碰撞也會改變星系的外形，特別是當兩螺旋星系融合后可能會產生單一的橢圓星系。 -
Whether an entire galaxy becomes a disk is a timing issue : spiral galaxies emerge from gas that becomes rotationally supported before patches of the gas contract into stars
至於整個星系變成一個圓盤則是時機問題：螺旋星系的出現，是因為在每一小團氣體因收縮而形成恆星前，整團氣體已經成為旋轉性支撐。 -
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
銀河系可說是我們周遭大質量螺旋星系的典型，根據觀測到的大質量恆星數目判斷，銀河系的恆星形成率為每年數個太陽質量。 -
Another possibility is that large - scale spiral waves in the disk, similar to the spiral arms observed in galaxies, hasten the inflow of matter
另一個可能性是，類似星系旋臂的大尺度螺旋波，加劇了物質的向內流動。 -
( 2 ) base on the complete sample of 178 spiral galaxies in the virgo cluster given by fouque et al. ( 1990 ), the sv orientation distribution of the spiral galaxies with known galactic inclinations is studied
（ 2 ）利用fouqueetal . （ 1990 ）所得的帶有傾角數據的完備的virgo團旋渦星系樣本，對virgo團旋渦星系旋轉矢量分佈進行了統計分析。 -
Hubble space telescope image ? shows m87 [ lower right ] a giant elliptical galaxy. elliptical galaxies do not take on the flat - disk or spiral shapes that most galaxies do
哈勃望遠鏡拍攝下來的圖象： m87一個巨大的橢圓星系。橢圓星系並不具有大多數星系具有的扁圓或是螺旋型的形狀。 -
A hubble space telescope image ? shows m87 [ lower right ] a giant elliptical galaxy. elliptical galaxies do not take on the flat - disk or spiral shapes that most galaxies do
哈勃望遠鏡拍攝下來的圖象： m87一個巨大的橢圓星系。橢圓星系並不具有大多數星系具有的扁圓或是螺旋型的形狀。
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