An expanding universe complicates this picture just a little bit, because the universe absolutely refuses to be ...

A new study casts doubt on the universe’s accelerating expansion, suggesting dark energy might be weakening over time.

Will the universe keep existing forever? An astrophysicist explains how scientists aren’t entirely sure, but they can make ...

The surface of Earth is finite. We can measure it. If it was expanding, then its size would grow with time. And once again, good ol' Earth helps us understand what the universe might be doing beyond ...

In 1919, physicist Theodor Kaluza hypothesized that extra dimensions might solve some outstanding problems in physics. And ...

Understanding how the universe transitioned from darkness to light with the formation of the first stars and galaxies is a key turning point in the universe’s development, known as the Cosmic Dawn.

"We really needed the sensitivity of JWST. We also needed the 100 times magnification from gravitational lensing from a ...

The landscape of astronomy really changed in the 1860s, when the development of spectroscopy ushered in a new era of understanding the universe: the era of astrophysics. Finally, astronomers could ...

Discover James Webb discoveries revealing the JWST early universe, cosmic dawn insights, and groundbreaking new space ...

Space looks very dark from Earth. But does the solar system, and the universe for that matter, have an area that's the darkest of all?

Antimatter, particles with opposite charge to their matter counterparts, was theoretically predicted and later experimentally confirmed, existing naturally due to charge conservation in particle ...

For more than a century, physicists have suspected that the familiar three dimensions of space and one of time might be only ...