2 answers
★ Best answer
I was watching a documentary the other day and I was really struck by how the Webb manages to capture light that's been traveling for billions of years. Basically it uses a giant mirror made of beryllium coated in gold, which collects infrared light from distant stars - exactly what our eyes can't see. Gold is perfect because it reflects infrared without absorbing it, and then the whole system is kept cold (we're talking minus 230 degrees) so the sensors don't get confused with ambient heat. It's really cool how such a sophisticated instrument can simply do what Galileo's telescope did centuries ago: collect as much light as possible so we can see farther.
The principle is pretty straightforward: the giant mirror collects light that's been traveling for billions of years and focuses it onto infrared sensors that convert it into data 🔭 What a lot of people don't really mention is that Webb doesn't "see" the way the human eye does - it photographs mostly in infrared, so what we see in those colorful images is actually an artificial translation made by scientists, not the "true" color of space. That's why the photos are absolutely stunning but technically a processed version.
Infrared is crucial precisely because the light from those incredibly distant stars has shifted toward longer wavelengths during its journey, and capturing it in the visible spectrum would be impossible.
Your answer
Log into answer.