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

A new analysis estimates that the asteroid belt is steadily losing mass each year, and may not be as permanent a feature of ...

Now, in a new yet-to-be-peer-reviewed paper, an international team of astronomers analyzed data collected by the European ...

Dwarf planet 2023 KQ14, Ammonite, has a stable orbit that challenges the hypothesis of the mysterious Planet Nine.

Just two decades after astronomers discovered the first exoplanet, NASA has confirmed the existence of 6,000 alien worlds.

Our solar system is a smashing success. A new study suggests that from its earliest period—even before the last of its ...

Rogue planet outside our solar system expanding rapidly in huge ‘growth spurt’ - Free-floating planet is consuming gas and ...

Two recent studies used seismic data from NASA’s retired InSight mission to shed light on what lies beneath Mars’ surface and what it means for the planet’s history The spacecraft will map the ...

A NASA mission, IMAP, and two more spacecraft that will study space weather are traveling through space atop a single SpaceX ...

The methane gas may constitute a rarefied atmosphere, or it may come from erupting plumes on Makemake’s surface.

Chrysalis, a 36-mile rotating space habitat, plans to take 2,400 people to Alpha Centauri in approximately 400 years.

Earth has breached a critical boundary for ocean acidification, with potentially grim effects for ocean ecosystems and human ...