Are planets in the solar system that are closer to the Sun older than the ones further away? – Gavriel, age 10, Paducah, Kentucky A cloud of collapsing gas created our Sun, the first thing to form in ...

Roughly four and a half billion years ago the planet Theia slammed into Earth, destroying Theia, melting large fractions of ...

New research shows that Theia, the planet that collided with Earth and formed the Moon, was a rocky world born closer to the ...

Jupiter’s early growth carved rings in the solar system, delayed meteorite formation, and kept planets like Earth in stable ...

Astronomers might have found evidence of a structure located farbeyond Neptune, potentially giving us clues about the solar ...

This marks the first time astronomers have observed the formation of a ring system. Saturn isn't the only planet in our solar system with a ring system. While Saturn's rings are the most dramatic, the ...

Astronomers have discovered a rare in-sync solar system with six planets moving like a grand cosmic orchestra, untouched by outside forces since their birth billions of years ago. The find, announced ...

A newly discovered cluster of objects called the “inner kernel” of the Kuiper belt could teach us about the early history of ...

Study from Bielefeld finds major departure from the standard model. How fast and in what direction is our solar system moving through space? This question, though simple in appearance, plays a central ...

A mind-bending hypothesis is gaining traction among scientists: The universe may be teeming with microscopic black holes the size of an atom, but with the mass of a city-sized asteroid. Created just a ...

Scientists say 3I/Atlas came closest to Mars in October. Its path this month put it in the path of the warm rays of our sun, where a tail became more visible. The 3.5-mile solar object is traveling at ...