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Nature

The expansion of the universe is a fact that has been proven for a long time. But the difficulty in measuring the distance of galaxies, independent of their reddening, is such that determining the current rate of expansion, Hubble's constant, has become an exhausting and long process in the last 50 years.

Part of this expansion is due to inertia🎭🎭🎭

While the universe's expansion is confirmed, the effort to measure Hubble's constant has been prolonged by the complexities of assessing galaxy distances.

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