More than 13 billion years ago, during the Era of Reionization, the universe was a very different place. The gas between galaxies was largely opaque to energetic light, making it difficult to observe ...

For hundreds of a millions of years, the universe existed in the dark ages—an epoch when only primordial gasses existed. Then, a period of reionization, cleared away this foggy existence an introduced ...

Prefer Newsweek on Google to see more of our trusted coverage when you search. The mysteries of a strange era in the universe's history may have been uncovered by scientists. This "epoch of ...

The James Webb Space Telescope has caught a distant galaxy blowing an unexpected bubble in the gas around it, just 330 million years after the Big Bang. The galaxy, dubbed JADES-GS-z13-1, marks the ...

New data from the South Pole Telescope indicates that the birth of the first massive galaxies that lit up the early universe was an explosive event, happening faster and ending sooner than suspected.

Scientists create the most detailed and accurate simulation ever produced of the first billion years of the universe. The CoDa III simulation shows galaxies forming in the early universe along the ...

Cosmic reionization denotes the transformative epoch when the first luminous sources emerged, ending the cosmic dark ages by ionising the pervasive neutral hydrogen. This period, which encompasses ...

An array of 350 radio telescopes in the Karoo desert of South Africa is getting closer to detecting “cosmic dawn” — the era after the Big Bang when stars first ignited and galaxies began to bloom.

Light from the most distant sources known, emitted when the Universe was only a billion years old, hints at a complex history of star and galaxy formation, and at their effect on the primordial gas ...