The number of planets that orbit the sun depends on what you mean by “planet,” and that’s not so easy to define ...

An object eight times the mass of Jupiter may have swooped around the sun, coming superclose to Mars' present-day orbit ...

The enormous visitor to our solar system may have been about 8 times the mass of Jupiter, and come nearly as close to the sun ...

Astronomers have made a groundbreaking discovery in the WASP-132 system, finding two new planets that defy previous ...

All of our solar system’s planets are lining up to parade through the night sky at once. This extraordinary celestial event ...

Scientists suggest an interstellar visitor may have altered planetary orbits in our Solar System, reshaping trajectories of ...

BS4 may be anywhere between 17 and 40 feet across, and will approach at about twice the distance between the Earth and moon.

Astronomers have discovered extremely powerful winds pummeling the equator of WASP-127b, a giant exoplanet. Reaching speeds ...

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. A planet-size object that possibly once visited the solar system may have permanently ...