It’s “common knowledge”—and the scare quotes should be a warning—that the sun is an average star.

A novel theory suggests that the current expansion rate of the universe is not fixed, but was in fact quite different in the ...

The ancient and rare star PicII-503 is helping astronomers understand how carbon became so abundant in the universe.

Earlier estimates of its age were around 7 billion years, but a new study suggests it’s much older.

The local universe may be expanding more slowly than previously thought, a discovery that could relieve a pesky discrepancy ...

The interactive online map, created using data from NASA's James Webb Space Telescope, details some 800,000 galaxies across a vast cosmic distance. Scrolling and zooming in can take users some 13.5 ...

Scientists studying a mysterious effect called cosmic birefringence—a subtle twist in the polarization of the universe’s ...

Dimensions beyond the four we’re familiar with could solve a host of problems in physics and cosmology. Columnist Leah Crane ...

The results reveal that our universe is reverberating with cosmic collisions. Some of the waves stem from pairs of black holes colliding, and others appear to have come from crashing black holes and ...

Observations show the universe appears flat, yet its true size and global shape beyond the observable horizon may remain ...