Explore the true scale of the Solar System in this video, which illustrates the relative sizes of the planets and their ...

The Solar System. NASA The most distant gravitationally bound objects to the Sun are aperiodic comets. Aperiodic, or long-period comets, can take many thousands of years to complete one solar ...

Scale Model Solar System Scale Model Solar System Have you ever wondered just how big space really is? It’s huge. In fact, it’s astronomical! The Colorado Scale Model Solar System depicts the Sun, the ...

Starting with an Earth the size of a marble, these folks built a full-scale model of our solar system across 7 miles of Nevada desert.

A mysterious object from beyond our solar system, 3I/ATLAS, has recently captured the attention of astronomers once again.

NPR's Ari Shapiro talks with astronomer David Jewitt about what we can learn from the third interstellar object to have entered our solar system, a comet-like object known as 3I/ATLAS.

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 ...

A tiny meteorite is rewriting what scientists thought they knew about the origins of our solar system.

Astronomers have discovered the earliest seeds of planets forming around HOPS-315, a baby star located 1,300 light-years away.

An extreme cousin for Pluto? Possible dwarf planet discovered at solar system's edge by Lee Sandberg, Institute for Advanced Study edited by Gaby Clark, reviewed by Robert Egan Editors' notes ...

Astronomers have discovered that the largest comet from the Oort Cloud, a shell of icy bodies at the very edge of the solar system, is bursting with chemical activity.