Called Olbers’ paradox, the seemingly simple mystery of the sky’s darkness is something that stumped astronomers for ...

It all started with a Big Bang – and now scientists are on a quest to unravel the mystery behind the birth of the universe.

When we go backwards in time through the history of the cosmos, the distances and volumes shrink, while the average energy ...

The Epoch of Reionization — the universe’s last major transition — may have happened earlier than previously thought.

For a long time, astronomers believed galaxy formation followed a very specific model: cosmic gas collects in clumps, stars ...

In an underground lab in a mountainous region of Italy that contains the coldest temperatures known to exist in the universe, ...

Astronomers have identified three ultra-massive galaxies -- nearly as massive as the Milky Way -- already in place within the first billion years after the Big Bang. This surprising discovery was made ...

The James Webb Space Telescope (JWST) has discovered three massive galaxies, dubbed "red monsters," that challenge current ...

Over the last century or so, science has homed in on an answer ... Just a few millionths of a second after the Big Bang, as the universe expanded and cooled, quarks and gluons clumped together ...

Over the last century or so, science has homed in on an answer: the Big Bang. This describes how the Universe was born in a cataclysmic explosion almost 14 billion years ago. In a tiny fraction of a ...

Since the discovery of the acceleration, theorists have calculated that the universe will continue to expand faster and ...

Theoretical physicist Abhay Ashtekar is famous for having worked on an idea for how space-time itself is generated. So we ...