SMRTR Science & EngineeringJun 19, 2025The Register

ESA's XMM-Newton finds huge filament of missing matter

SMRTR summary

Astronomers have discovered a massive hot gas filament spanning 23 million light-years and connecting four galaxy clusters. This finding could explain some of the universe's "missing" matter, with the filament containing ten times the mass of the Milky Way and reaching temperatures over ten million degrees. The discovery aligns with cosmic models and sheds light on the structure of the universe's "cosmic web."

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