intergalactic matter

Example Sentences

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This experiment served as a small-scale simulation of how a blazar's pair cascade moves through intergalactic matter.

From Science Daily • Nov. 7, 2025

Many cosmic rays are in fact extremely high-energy photons—gamma rays—that can be absorbed by interstellar or intergalactic matter as they travel through space.

From Scientific American • Jun. 29, 2023