Invisible Walls In Space May Explain a Problem That Has Been Perplexing Scientists - IGN - IGN

A new theory that posits a "fifth force" in physics may explain why galaxies orbit each other the way they do without discarding our traditional understanding of the cosmos.

One of the biggest challenges to our traditional understanding of the cosmos is something called the "satellite disk problem." In essence, scientists are confused because smaller galaxies orbit large… [+2037 chars]

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