Seeing the Web Connecting Galaxies Across the Universe

Look deeply into the Universe; the bright galaxies are the first thing you'll see. Surrounding and connecting these islands of stars is the cosmic web. These are streams of gas that flow into galaxies, supporting their star formation. Astronomers have used the new Keck Cosmic Web Imager in Hawaii to image the cosmic web, revealing the filamentary network that connects galaxies across billions of light-years of space. Previously, the web was only visible when illuminated by bright objects like nearby quasars, but this new technique can show even the faintest material.

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https://www.caltech.edu/about/news/cosmic-web-lights-up-in-the-darkness-of-space