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

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

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

The European Space Agency also hoped to observe the interstellar object during its close approach to Mars using two ...

While Planet Y has been not yet been directly observed, unexpected inclinations found in the orbits of roughly 50 distant ...

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

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

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

Japan has retrieved a capsule of asteroid dust from Australia's remote outback after a six-year mission that may help uncover more about the origins of the planets and water, the Asian nation's space ...

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

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 ...