spiral galaxy meaning in English
【天文学】螺旋星系。
Examples
- There is a curious feature in the spectra of spiral galaxies .
在旋涡星系的光谱中有一种奇妙的特征。 - Spiral galaxies are considered to be gravitationally bound configurations of stars .
旋涡星系被认为是由恒星组成的引力束缚系统。 - But almost all spiral galaxies are much older than 2 billion years
但是几乎所有旋涡星系的年龄都超过了20亿年。 - The mystery arises when one considers how a spiral galaxy rotates
当人们考虑旋涡星系是如何转动的时候难题就来了。 - New stars are constantly forming out of gas and dust in spiral galaxies
在旋涡星系中不断由气体和尘埃形成新的恒星。