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Cosmos Controversy: The Universe Is Expanding, but How Fast?

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A small discrepancy in the value of a long-sought number has
fostered a debate about just how well we know the cosmos.

There is a crisis brewing in the cosmos, or perhaps in the community of cosmologists. The universe seems to be expanding too fast, some astronomers say.

Recent measurements of the distances and velocities of faraway galaxies don’t agree with a hard-won “standard model” of the cosmos that has prevailed for the past two decades.

Read the article on NYTIMES