Astronomers have uncovered a massive new trans-Neptunian object, 2017 OF201, lurking at the edge of our solar system. With an ...

Astronomers have discovered a large trans-Neptunian object, 2017 OF201, at the edge of the solar system. Its strange orbit challenges the Planet Nine theory and shows the space beyond Neptune is not ...

Science Beyond the Planets: The Quirky Underdogs of the Solar System From centaurs to icy moons, our host star is orbited by an array of objects with bizarre features.

Astronomers may have demoted Pluto from full-fledged planet to dwarf status, but evidence suggests the solar system may still ...

While Bode’s law is a great observation with regard to much of the solar system, it is not reflective of the physics that dictates the planets’ motions or distances.

Using a cutting-edge adaptive optics system developed at the University of Arizona's Steward Observatory, a growing planet ...

Contrary to what simplified Styrofoam ball models of the solar system from grade school taught us, our planetary neighborhood contains much more than the sun and major planets orbiting it. There ...

The Sun and planets of our solar system all formed from the same cloud of gas and dust, but the planets’ compositions vary with mass and distance from our star. This illustration shows the ...

This artist’s concept depicts one of the solar system’s inner planets slamming into Earth after being nudged on a collision course by a passing star. Such a world-shattering cataclysm is ...

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 ...

Almost 20 years after Pluto was infamously downgraded from its status as a planet, scientists now believe they have discovered a new planet in our solar system.