NASA's Spectro-Photometer for the History of the Universe, Epoch of Reionization and Ices Explorer (SPHEREx) was built for the ambitious purpose of performing an all-sky survey. The data it collects ...

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 ...

New analysis of data taken by the European Space Agency’s (ESA) Planck spacecraft of the cosmic microwave background (CMB) has revealed that the “epoch of reionization” occurred much later than ...

Add Yahoo as a preferred source to see more of our stories on Google. For millions of years following the Big Bang, after the universe’s roiling soup of particles had cooled, the cosmos was a dark and ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." For hundreds of a millions of years, the universe existed in the dark ages—an epoch when only primordial ...

The mysteries of a strange era in the universe's history may have been uncovered by scientists. This "epoch of reionization" was a period in the early universe's history when the first stars and ...

During the first billion years of the Universe’s history, the gradual cooling from the Big Bang was reversed, and much of the gas was re-heated and ionized. This event, known as reionization, happened ...

Scientists call it the epoch of reionization, the period in which a newborn universe went from darkness to light as the first stars, galaxies and black holes began forming and radiating energy. In a ...

Scientists can explain why the universe has enough energy to become transparent. The study marks the first quantitative study of how the gas content within galaxies scales with the amount of ...