Light from quasar reveals intergalactic web

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Light from ancient quasar reveals intergalactic web

Astronomers say it's the first direct imaging of the long-sought gas filaments stretching between galaxies.

Astronomers have discovered the largest known gas cloud in the Universe. The mammoth nebula may be the first imaged filament of a spidery arrangement of galaxies, gas and dark matter that traces the large-scale structure of the cosmos. The team used a brilliant quasar, seen as it appeared when the Universe was less than 3 billion years old, to illuminate the faint gas in the beacon’s neighbourhood.

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