In the 30 years since the discovery of 51 Pegasi b, more than 6,000 planets outside our Solar System have been catalogued. Two modern-day explorers explain how.

A new study suggests yet another theory for a possible extra planet in our solar system, likely of a size between Mercury and ...

How would you go about answering the question “How many people have ever lived on this planet?” If you type that into Google ...

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

Astronomers have discovered new evidence that suggests the possibility of an unknown planet in our solar system's farthest reaches. The study, published in the Monthly Notices of the Royal ...

Oct. 7 full moon marks first supermoon of 2025. What we know about Harvest moon, Draconid and Orionid meteor showers.

Looking further into the future, even bigger projects are on the horizon. NASA’s Habitable Worlds Observatory, expected in ...