Most cosmologists believe that these stars were the first large, free-floating structures to illuminate our universe, and ...

In a significant development, astronomers have unearthed a spiral-shaped anomaly nestled deep within the cosmos. This ...

For more than a century, physics has been built on two great theories. Einstein's general relativity explains gravity as the ...

In 2021, astronomers discovered the "Giant Arc" spanning 3.3 billion light-years in the constellation of Boötes the Herdsman.

Seeking endorsements for her new book, Chanda Prescod-Weinstein finds herself staring at fundamental questions of space, time ...

The formation of Mercury remains an unsolved mystery. The planet closest to the sun has a disproportionately large metallic ...

The LSST camera at the Vera C. Rubin Observatory has released its jaw-dropping first images, each capturing 45 times the area of the full moon in one shot. Over the next ten years, this cosmic giant ...

Dark energy —the term used to describe whatever is causing the universe to expand at an increasing rate—is one of the ...

Watch Pop Mech ’s Jackie Appel reveal the story of how two men from New Jersey named Arno Penzias and Robert Wilson made one of the most important discoveries in the history of astronomy—by accident.

For a quarter century, cosmology has leaned on one framework to explain how the universe expands. Known as the ΛCDM model, it ...

The aurora borealis has been remarkably bright recently. Space weather physicist Tamitha Skov reveals what's going on and how ...

Physicists predict a 90 percent chance of witnessing a primordial black hole explosion this decade, testing Hawking’s most ...