The nature of dark energy remains one of the biggest puzzles in cosmology.

If we lived in a cosmic area with below average density, it would explain recent contradictory measurements of the universe’s expansion.

The universe is expanding faster than physicists would expect. To figure out what processes underlie this fast expansion rate, some researchers are first trying to rule out what processes can’t.

The universe appears to be fine-tuned for life to evolve.

From improving our understanding of dark matter to revealing the location of Earth 2.0, the Extremely Large Telescope promises answers to some of the biggest scientific questions of our time.

The Euclid mission is preparing to launch on July 1.

A spacecraft set to launch this year will throw a spotlight on the mysterious ‘dark side’ of the universe.

"The question of the nature of dark energy is perhaps the most important unanswered question in contemporary physics...."

Astronomers have found that mysterious dark energy may originate in black holes.

Analyzing more than two decades’ worth of supernova explosions, astrophysicists now have the most precise limits yet on the composition and evolution of the universe.