A typical optical telescope has a diameter a few million times the wavelength of visible light.

传统的光学望远镜的直径是可见光波长的数百万倍。

The project will feature a 1.2-meter aperture optical telescope that's able to take high-quality images.

CHES计划有效载荷为一台口径1.2米，能够拍摄高质量图像的光学望远镜。

Andreas Lundgren, a Swedish astronomer who works on the project, explained what advantages this radio telescope has over traditional optical telescopes.

工作于该项目的瑞士天文学家Andreas Lundgren解释了该电波望远镜与传统光学望远镜相比的优势。

Called 3C273, through optical telescopes it looked like an unassuming blue star, but through a radio telescope it was seen to be ablaze with light, a luminous powerhouse.

它被称为 3C273，通过光学望远镜进行观测，它看起来就像一颗不起眼的蓝星，但通过射电望远镜看，它就像一个发光的发电站。

Making it worse, gamma-ray bursts — let's call them GRBs for short, OK? — GRBs fade rapidly, lasting mere seconds or minutes, making it impossible to follow up with optical telescopes.

更糟糕的是，伽马爆——我们就将其简称为 GRBs，好吗？——GRBs 衰减迅速，持续时间仅为几秒或几分钟，光学望远镜无法跟踪。

Well, the sort of telescope you might use at home to look at the Moon or spy on your neighbours - that's an optical telescope.

好吧，你可能会在家里用这种望远镜来观察月球或监视你的邻居——那是光学望远镜。

This means they can detect invisible gases and reveal whole new areas of space that optical telescopes can't see - because with those, cosmic dust often gets in the way.

这意味着它们可以探测到不可见的气体，并揭示光学望远镜看不到的全新空间区域——因为有了这些，宇宙尘埃常常会挡住视线。

Probably the most important observatory is NASA's Swift, designed to detect the flash of gamma-rays from a burst, then swing rapidly into action to point its ultraviolet and optical telescopes at the area, precisely locating the burst.

也许最重要的天文台是 NASA 的雨燕天文台，它的设计目的是探测爆发的伽玛射线光，然后迅速采取行动，将其紫外辐射和光学望远镜对准该区域，精确定位爆发。

The same way we observe visible light from celestial objects using our eyes and optical telescopes, we can also take advantage of the other parts of the electromagnetic spectrum in astronomy.

就像我们用眼睛和光学望远镜观察天体发出的可见光一样，我们也可以利用天文学中电磁波谱的其他部分。

Giant observatories with optical telescopes have been around since the 19th century and there's now a new one being built in Chile - you can see why they've called it the Extremely Large Telescope.

带有光学望远镜的巨型天文台自 19 世纪就已存在，现在智利正在建造一个新的天文台 - 您可以明白为什么他们将其称为超大望远镜。

Hubble Space Telescope Program Manager Douglas Broome delivered the troubling news: “The conclusion we’ve come to is that a significant spherical aberration appears to be present in the optics, in the optical telescope system optics, ” he said.

哈勃太空望远镜项目经理道格拉斯·布鲁姆 (Douglas Broome) 发布了这个令人不安的消息：“我们得出的结论是，光学望远镜系统的光学元件中似乎存在明显的球面像差， ” 他说。