Explore the evidence that supports the theory of the expanding universe, including the observations of distant galaxies and ...

Scientists have many big questions to tackle about the universe, including how big it actually is. But even the proposed answers aren't straightforward.

The universe’s expansion might not be accelerating but slowing down, a new study suggests. If confirmed, the finding would upend decades of established astronomical assumptions and rewrite our ...

Two clashing ideas about disorder inside black holes now point to the same strange conclusions, and it could reshape the ...

Knotted structures once imagined by Lord Kelvin may actually have shaped the universe’s earliest moments, according to new ...

But the Big Bang theory predicts that about 5% of the universe’s contents should be atoms made of protons, neutrons and electrons. Most of those atoms cannot be found in stars and galaxies – a ...

The universe’s expansion might not be accelerating but slowing down, a new study suggests. If confirmed, the finding would upend decades of established astronomical assumptions and rewrite our ...

Before Einstein, before Bohr, there was a Jesuit priest with a telescope and a startlingly modern vision of the universe.

FROSTI is a new adaptive optics system that precisely corrects distortions in LIGO’s mirrors caused by extreme laser power.

The geometry of space, the setting in which physical laws operate, may hold clues to some of the biggest unanswered questions in fundamental physics. The underlying structure of spacetime itself could ...

The idea that we might be living in a simulated reality has worried us for centuries. Now physicists have found some ...