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.

Learn about the latest data from the ESA's Euclid telescope, classifying 380,000 galaxies and bringing us one step closer to ...

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