Here’s something they didn’t teach you in school: Gravity killed the dinosaurs. Or, more precisely, a universe-wide change in gravity helped kill the dinosaurs, by yanking a giant space rock out of ...

The cold and mysterious Oort cloud at the edge of our solar system may be hiding a rogue exoplanet, new research suggests. When you purchase through links on our site, we may earn an affiliate ...

Jupiter kicked it toward Earth. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. The chunk of space rock that killed the nonavian dinosaurs may ...

Groundbreaking research published on February 16, 2025, turns centuries-old assumptions about the shape of the outer edge of the solar system upside down. The Oort Cloud, traditionally thought to be a ...

The boundary of a solar system is not defined by planets, but by gravity. Beyond Pluto and the Kuiper Belt lies the Oort ...

In a nutshell: Far beyond the orbit of Pluto lies a mysterious region filled with icy objects circling the Sun. This distant zone, known as the Oort Cloud, remains unseen, but its existence is ...

While the Sun is very clearly a solo act nowadays, some astronomers theorize that it once had a binary companion star. Now, Harvard scientists have added weight to the idea by showing that an ancient ...

The solar system has a new most distant member, bringing its outer frontier into focus. New work from Scott Sheppard from the Carnegie Institution for Science in Washington, D.C., and Chadwick ...

Rocky fireballs like the one that fell over Alberta, Canada last year shouldn't originate from the icy Oort Cloud... but this one apparently did. When you purchase through links on our site, we may ...

Familiar comets like Halley and Hale-Bopp make a dramatic entrance when they swing in close to the sun, sending million-mile-long streamers of glowing gas across the night sky. But there’s a long and ...

In 1906, astronomer and businessman Percival Lowell launched a search for "Planet X," a hypothetical giant planet orbiting the sun beyond Neptune. Lowell was convinced that Planet X existed based on ...

Jupiter kicked it toward Earth. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. The chunk of space rock that killed the nonavian dinosaurs may ...