A rare alignment of two exoplanets with their star, marking one of the few known exosyzygies, an astronomical event involving ...

Planets usually stay close to their host stars, tracing steady paths shaped by gravity. Yet some planets break free and drift ...

For the first time, astronomers have directly measured the mass of a rogue planet, a celestial body wandering through space ...

In doing so, they found this orphan is within the same weight class as Saturn, strengthening the case that the galaxy teems ...

Their analysis showed that the planet lies about 3,000 parsecs, or just under 10,000 light-years, from Earth. Its mass is ...

While most planets that we are familiar with stick relatively close to their host star in a predictable orbit, some planets ...

JACKSONVILLE, Fla. – When the “stars align” you may think good things happen. When the literal stars align, it’s known as a celestial event. This rare event is a good thing because it won’t happen ...

A visible line of planets has for weeks been the talk of astronomers and hobbyist stargazers who have sought to catch a sight of our solar system's worlds. Online chatter and a frenzy of media ...

Using gravitational microlensing, scientists have discovered a rare, large planet at the edge of the Milky Way. The planet is only the third to be found on the outskirts of our galaxy's dense central ...