Last year, our most detailed map of the universe yet suggested our understanding of dark energy has been wrong for decades. The shock result is reigniting the search for a better cosmic story ...

Moons may seem like quiet companions to the planets, but many of them are worlds every bit as fascinating as the planets themselves. Some are covered in oceans, some erupt with lava, and others hide ...

Astronomers have long known the universe is expanding—but exactly how fast remains one of the biggest mysteries in cosmology. Different techniques for measuring the Hubble constant stubbornly disagree ...

The Rubin Observatory’s real-time alert system can detect millions of cosmic events per night, from asteroids to supernovae, ...

There have been plenty of attempts to resolve the "Hubble Tension" in cosmology. This feature describes how one of the most important variables in cosmology, the expansion of the universe, takes on ...

A closer look at the Lambda Cold Dark Matter model, its core components, supporting evidence, and why new observations are ...

“While 3I/ATLAS is a visitor from interstellar space, travelling from outside the Solar System, its behaviour is completely ...

Six planets are set to align on Saturday, creating a planetary parade that will be visible to sky-gazers across the globe.

The next asteroid won’t come with a warning siren. What happens after it’s discovered could determine everything.

Despite the dramatic name, these alignments aren’t exceptionally rare. The last six-planet parade occurred in January 2025, ...

On Thursday, Princeton University celebrated its leading role in NASA’s IMAP mission, highlighting how faculty and students are collaborating to study the boundary of our solar system and improve ...

Some of the universe's most extreme explosions leave behind almost no trace. The original explosion is unseen, but our observations can capture the long-lived echo it leaves behind as the shock front ...