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Tag Archives: Christopher Martin

The intergalactic medium unveiled: Cosmic Web Imager directly observes ‘dim matter’

Comparison of Lyman alpha blob observed with Cosmic Web

Caltech astronomers have taken unprecedented images of the intergalactic medium (IGM) — the diffuse gas that connects galaxies throughout the universe — with the Cosmic Web Imager, an instrument designed and built at Caltech. Until now, the structure of the IGM has mostly been a matter for theoretical speculation. However, ...

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