Prefer Newsweek on Google to see more of our trusted coverage when you search. New research has unveiled images of the universe in its infancy—a mere 388,000 after the Big Bang. The snaps of the ...

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The clearest pictures yet of the newborn cosmos strengthen the prevailing model of the universe but deepen a mystery about its expansion rate. Measurements of this rate, known as the Hubble constant, ...

Sometimes, a picture can be worth much more than a thousand words. For instance, one measure associated with the pictures below—new high-definition snapshots of the cosmos in its infancy—is 1,900 ...

So much happened in the earliest moments of the universe. Elementary particles appeared, the first nuclei of hydrogen and helium, and fluctuations of energy and matter set into motion the formation of ...

It’s hard to picture the universe in its infancy. The middle-aged cosmos now stretches across 93 billion light-years, holding up to two trillion galaxies and more than 200 billion trillion stars. But ...

Astrophysicists are poring over new data from Europe’s Planck cosmic background explorer for clues to the period in the early universe known as inflation, when the Big Bang theoretically was followed ...