"Euclid shows itself once again to be the ultimate discovery machine. It is surveying galaxies on the grandest scale, ...

The largest-ever three-dimensional map of the cosmos, plotting out some 15 million celestial objects, could help reveal the ultimate fate of the universe. Astrophysicists know that the universe is ...

The DESI experiment shocked cosmologists with a hint that dark energy varies over time. Now, with more data, the conclusions hold up.

When we observe distant celestial objects, there is a possible catch: Is that star I am observing really as reddish as it ...