The search for an unknown planet in our solar system has inspired astronomers for more than a century. Now, a recent study ...

WASHINGTON (Reuters) -Just as Earth orbits the sun, most planets discovered beyond our solar system orbit a host star.

Astronomers have discovered fresh evidence suggesting the possible existence of an unseen planet in the far reaches of our ...

Astronomers have discovered new evidence that suggests the possibility of an unknown planet in our solar system's farthest ...

Space scientists look back on three decades of exoplanet discoveries—from rows of massive ‘super-Earths‘ to worlds with ...

A mysterious space object named 2023 KQ14, nicknamed “Ammonite,” challenges theories about the mysterious and possible Planet ...

This captivating video explores Sedna, one of the most distant and mysterious dwarf planets in our solar system. Discovered in 2003, Sedna orbits the Sun once every 11,400 years, traveling through icy ...

On October 6 1995, at a scientific meeting in Florence, Italy, two Swiss astronomers made an announcement that would transform our understanding of the universe beyond our solar system. Michel Mayor ...

Orbs with twin suns, a star twice as old as our sun... see how new discoveries, with surprising similarities to fiction, are rewriting our understanding of the universe.

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