星系

Our sun is one of several 100 billion stars in spiral galaxy, the Milky Way.

我们的太阳只是螺旋形的银河星系中1000亿星星之一。

The answer has a lot to do with how we know we live in a spiral galaxy in the first place.

最主要的原因是我们就身处在这个螺旋星系之中。

I mean, you can't look up into the sky and see the spiral structure of our galaxy, so how do we know it's there?

我的意思是，不可能仅仅靠看天空就能发现我们螺旋型的星系，所以我们怎么可能知道他的存在呢？

Our Galaxy is classified as a spiral galaxy and is composed of about 100 billion stars.

我们身处的银河系是一个螺旋星系，当中包含了千亿颗恒星。

The middle image is an example of a tiny, youthful spiral galaxy.

处于中间的是一个小而年轻的旋涡状星系。

Explanation :Is this a spiral galaxy?

说明： 这是一个螺旋星系吗？

What's happening at the center of spiral galaxy NGC 1097?

说明：旋涡星系NGC1097的中心正在发生什么？

This neighboring spiral galaxy appears in our sky as a large hazy patch – bigger than a full moon.

邻近的螺旋星系，在我们的天空里只显示为一个比一轮满月大的模糊斑点。

Note that the shape of the normal-looking spiral galaxy has changed.

请注意，形状正常前瞻性的螺旋星系发生了变化。

This pair of galaxies illuminates the distribution of galactic dust beyond the visible arms of a spiral galaxy.

这两个重叠的星系发出的光照亮了一个螺旋星云的一条可见的旋臂上分布的尘埃。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。