Its neutrinos reached Earth about three hours ahead of the visible light.

这些中微子比光提前三小时抵达地球。

This pulse can be detected in visible light, radio waves, and even X-rays!

这种脉冲以在光、无线电波、甚至X射线中被探测到！

But in visible light the planet looks almost featureless.

但在光下裸眼观看，这颗行星看起来几乎毫无特色。

There are clouds, but again they're difficult to see in visible light.

天王星有云团环绕，但同样，在光下很难看到。

This is what we call “visible light, ” also known as the visible spectrum.

这们所说“光”，又叫光谱。

At the lower end of the spectrum, there's radio, infrared, and visible light.

在光谱低频端无线电，红外线，和光。

Together, all the colors make up the spectrum of visible light—the light we can see.

所有颜色一起构成了光光谱——们所能看到光。

The wavelengths we see through our eyes, we call visible light.

们通过眼睛看到波长，们称之为光。

The exoplanet Fomalhaut b was the first one photographed with visible light.

这个名为“北落师门b”系外行星第一个用视光拍到行星。

Together with visible light, all these types of radiation are called the electromagnetic spectrum.

同光一起，所有类型辐射都叫做电磁频谱。

Just like visible light, x-rays are less likely to penetrate denser materials.

类似于光，X线难以穿过密度高物体。

There, they absorb infrared radiation and convert it to visible green light.

在那里，它们吸收红外辐射，并将其转化为绿光。

Infrared has a longer wavelength than visible light.

红外线波长比光更长。

And finally, we arrive back thirteen billion years ago, at the beginning of visible light.

最后，们抵达 130 亿年前抵达光起源。

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

传统光学望远镜直径光波长数百万倍。

Furthermore, it lies behind a shroud of dust that blocks any visible light from passing through.

此外在它前面还有一层阻隔任何光线通过尘埃。

Visible light just passes over them.

光只会穿过它们。

The whole kaboodle lets visible light pass untrammelled, while absorbing infrared and converting it into heat.

整个结构能够让光自由通过，同时吸收红外线并将其转化为热。

Radio waves pass right around “normal” telescopes, ones that we use to observe visible light.

无线电波会从们用来观测光“普通”望远镜周边穿过。

That energy is emitted as photons of visible light.

能量以光光子形式发射。