The Hubble tension is one of the most hotly debated discrepancies in all of astronomy. It centers around a number called the ...

It centers around the Hubble constant—the measurement of how fast our universe is expanding—which comes out as two different numbers when calculated two different ways, even though those ...

The rate at which the universe is expanding is expressed as a value called the Hubble Constant, generally abbreviated as “H 0 ...

"The discrepancy between the observed expansion rate of the universe and the predictions of the standard model suggests that ...

The universe doesn't have an outer perimeter, and nothing exists outside it, because there isn't an outside. As an analogy, consider the shape of our galaxy, the Milky Way. We can infer that it is ...

But from where Earth sits in the observable universe, our view extends more than 13 billion years into the past. Far outside our Local Group, astronomers have found galaxies so metal-poor and so ...

In this model, the anti-universe stretches backward in time from the Big Bang, mirroring the properties of our Universe with reversed spatial configurations and dominated by antimatter.

For years, scientists have been troubled by an unusual feature of our universe. It appears to be expanding faster today than it did in the past – and researchers are not sure why. Now the Webb ...

From mass fluctuations, to Little Red Dots, to new galaxies captured by the James Webb telescope—astronomy has learned a lot ...

Scientists have been searching for evidence of extraterrestrial life for decades. So, where are all the aliens? Here are 12 intriguing theories ...

The JWST conducted its largest survey yet of the accelerating expansion of the cosmos as scientists attempt to discover why the universe is expanding faster today than our picture of its infancy ...