The universe is believed to have started some 13.8 billion years ago, shortly thereafter forming the first stars and galaxies in space.Astrophysicists say the light of those initial galactic ...

This artist's concept shows how the universe might have looked when it was less than a billion years old, about 7 percent of its current age. Star formation voraciously consumed primordial ...

University of Zurich researchers generated a catalog of about 25 billion virtual galaxies, and it's set to help calibrate the Euclid satellite which will investigate the 'dark universe' in 2020.

This ended with a period of rapid inflation — the Big Bang — that saw the universe expand and cool, thus allowing the formation of matter — first atoms of hydrogen, then heavier elements ...

WSJ’s Aylin Woodward explains how they were captured and what they could tell us about the formation of the universe. Photo illustration: Laura Kammermann.