And although a second satellite containing the " eyepiece" (a special lens that also uses Fresnel optics, and a camera to record the image) must fly at the focus, the accuracy required is only hundredths of a metre, not billionths.

并且，尽管还必须有一个含有" 镜" （也是一种运用菲涅尔视觉的特殊透镜，也是一种记录图像的相机）的卫星在焦点上运行，所需要的精准度也只是百分之一米。

It's the eyepiece of the biggest microscope in the world.

它是世界上最大的显微镜的镜。

The astronomer William Herschel — the same man who discovered infrared light and the planet Uranus — gave them that name, because they appeared like small green disks through the eyepiece.

天文学家威廉·赫歇尔——也是发现红外光天王星的人——给它们取了这个名字，因为它们镜看起来像小小的绿色。

Prior to the launch of Hubble, when we thought of astronomy and telescopes, we really thought essentially of telescopes on the ground, people looking through eyepieces and things like that.

在哈勃发射之前，当我们想到天文学望远镜时，我们实际上想到的是地面上的望远镜，人们镜之类的东西来进行观察。

Stray light can bounce off of the inside of a telescope and end up in the eyepiece or focuser, which can affect the contrast and ruin the view.

杂光会在镜内不断反射，并最终呈现在镜或聚焦器上，这种反射不仅会影响对比度，也会破坏观测结果。

You literally stare into an eyepiece and see everything that's in your ear even that crayon you shoved in there when you were five. Still in there.

你可以盯着镜看，就可以看到耳朵里的一切，甚至你五岁时塞进去的蜡笔。还在里面。

In 1919, when Hubble first put his head to the eyepiece, the number of these galaxies that were known to us was exactly one: the Milky Way.

1919年，当哈勃第一次把脑袋伸向望远镜的时候，我们已知的星系数只有一个：银河系。

And in the image you see him looking through the eyepiece of a state-of-the-art telescope from 1949.

从相片中可以看到，他正1949年研发的最先进的望远镜镜进行观察。

But no sooner had I peered into the eyepiece than the instrument was snatched from my hands.

但我的眼睛还没有挨到镜面上，望远镜就突然被人夺走了。

I still remember seeing Saturn in the eyepiece, a perfect jewel, the rings small but vivid and sharp.

我仍然记得在镜中看到的土星，一件完美的珠宝，土星环虽小却生动清晰。

Does he have, how can I say this, glasses or an eyepiece?

他有没有，该怎么说呢，眼镜或者单片眼镜？

And the newly subtended angle is the amount that the object subtends when viewed through the eyepiece – the angle between your eye and the rays from the eyepiece.

而新的张角是物体镜观察时所张开的角度——即你的眼睛与镜发出的光线之间的角度。

The twinkle becomes more marked as magnification increases, making the objects appear juddering and fuzzy in the eyepiece of a telescope, or as diffuse smears of light in photographs.

随着放大倍数的增加， 闪烁现象变得更加明显，使得这些天体在望远镜镜中显得抖动且模糊，或在照片中呈现为散射的光斑。

First described in the early 17th century, the outfit consisted of a hood with crystal eyepieces and a beak filled with a pungent combination of herbs and compounds.

首次描述于 17 世纪初，这套装备包括一个带水晶镜的兜帽一个充满刺鼻的草药化合物组合的喙。

The way you get magnification is that you just divide the focal length of the objective glass by that of the eyepiece, of the ocular.

获得放大倍数的方法是将物镜的焦距除以镜的焦距。

The user looks into the eyepiece and uses the buttons on the phone to move two lines until they appear as one.

用户看着镜并使用手机上的按钮移动两条线，直到它们显示为一条线。

And just like with telescopes, the real image is just inside the focal point of the eyepiece, generating a large virtual image for the observer to view.

就像望远镜一样，真实图像 就在镜的焦点内，生成 一个大的虚拟图像供观察者观看。

He took an eyepiece from the countertop and he screwed it into his eye.

他从台面上拿出一个镜，拧进了他的眼睛。

In 1919, when Hubble first put his head to the eyepiece, the number of these galaxies that were known to us was exactly one—the Milky Way.

1919年, 当哈勃第一次把头伸向镜时, 我们已知的这些星系的数量恰好只有一个 - - 银河系。

And then an eyepiece down here.

然后在这里放一个镜。