Astronomers have long understood that the universe is expanding—in other words, the space in between cosmic objects that aren’t bound by gravity is getting ever more vast. Then, in 1998, scientists discovered the universe’s rate of expansion is accelerating.

When the James Webb Telescope came online in 2021, it promised to give a clearer picture of the universe that could help cosmologists better measure some of these distances and therefore the expansion rate. But the high-resolution images thus far have confirmed that the tension persists.

Hubble was right!' The largest cosmic survey from the James Webb Space Telescope indicates scientists may need another ingredient in their cosmic recipe.

Two years of data from NASA's James Webb Space Telescope have now validated the Hubble Space Telescope's earlier finding that the rate of the universe's expansion is faster - by a

The James Webb Space Telescope (JWST) has provided a stunning new glimpse into the cosmos, revealing findings that challenge one of the most persistent mysteries in modern astrophysics. For over a decade,

When two of humanity’s most powerful eyes on the cosmos agree something strange is happening, astronomers tend to pay attention. Now, the James Webb Space Telescope has backed up what Hubble has been telling us for years: the universe is expanding faster than our best physics can explain,