Science: Decelerating Universe

As every astronomer knows, the latest news from the edge of the known universe is more than a billion years old. The current Yearbook of the Carnegie Institution reports that the most distant observable galaxies, whose light started toward the earth more than a billion years ago, are not receding quite as fast as was expected. This conclusion is preliminary, but if it stands up to all tests, it will set the cosmological thinkers into a fresh flurry of figuring.

One of the solidest rules in cosmology (a field where solid rules are not prevalent) is that the universe is expanding, and...

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