In the 30 years since the discovery of 51 Pegasi b, more than 6,000 planets outside our Solar System have been catalogued. Two modern-day explorers explain how.

According to the equations that govern black holes, the larger one of these cosmic behemoths is the lower its average density ...

Calculating the total mass of the universe is not simple, because most of the mass is invisible. In a pie chart of the contents of the universe, only 5 percent is normal matter, atoms that make up all ...

Most of that brightness increase has been in the green part of the visible light spectrum, suggesting a “surge of gas ...

Rogue planet Cha 1107-7626 is swallowing gas and dust at roughly six billion tons each second, the fastest planetary growth ...

Exoplanet hunters Christopher Watson and Annelies Mortier explain the long search for a 'twin Earth' capable of sustaining ...

On Sept. 24, 2025, NASA launched two new missions to study the influence of the Sun on the solar system, with further ...

The comet, named 3I/ATLAS, is only the third confirmed interstellar object ever seen in our solar system. That means it came ...

In January I wrote a piece titled “ 5 Physics Equations Everyone Should Know .” Lots of you weighed in with your own ...

The uncommon interstellar visitor, comet 3I/ATLAS, is captivating astronomers worldwide as it races through our solar system at an astonishing speed of roughly 130,000 mph (219,000 km/h).