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Astronomy

The Evolution of the Intergalactic Medium: Filaments and Voids

Quick fact

The intergalactic medium is not uniform; it is arranged in a cosmic web of filaments and voids, and over 95% of the universe's ordinary matter resides in this diffuse gas, not inside stars and planets.

Why this is interesting

Imagine the universe as a giant, intricate web of gas, with massive walls and vast empty spaces. But how did this structure form, and why does it matter for the galaxies we see today?