We live in a golden age of astronomical imaging. Telescopes are capturing billions of galaxy images, painting the universe in breathtaking detail. But there’s a problem, and it’s a big one. A photograph tells you what something looks like but it doesn’t tell you what it’s made of, how fast it’s moving, or how far away it really is. For that, you need spectroscopy. And right now, astronomy has a catastrophic imbalance, billions of images and nowhere near enough spectra to match them. A new telescope currently under construction in the mountains of western China is about to change that quite dramatically.
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