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 ...

For the last month and change, you might've seen the headlines about the planetary alignment, or a planetary parade, going on in our solar system. And that's true. In January 2025, Venus, Mars, ...

On Feb. 28, a stellar alignment of planets will illuminate the night sky for the last time in a decade Space Frontiers/Hulton Archive/Getty Calling all stargazers and astronomy enthusiasts — something ...

A lucky alignment of space- and ground-based telescopes has enabled researchers to nail down the mass of a rogue planet for the first time. Unlike worlds in our Solar System, rogue planets do not ...

Mike Brown is convinced that beyond Neptune, at the far reaches of our solar system, there's an unseen giant planet. "This is the 5th largest planet in our solar system, lurking out there, waiting to ...

We have a "Great Planetary Alignment" coming up, and if the weather cooperates, night sky watchers in Boston could get a glimpse of this rare sight. You may have heard whispers about this over the ...