For instance, Neptune migrated outward, switching places with Uranus, and pushed a lot of the small, icy bodies into the ...

A recent study found that Jupiter was once twice the size that it is now, making it big enough to swallow up 2,000 Earths.

This model of solar system formation is known as the nebular hypothesis. The solar system is structured in a roughly flat plane called the ecliptic, with most planets orbiting the sun in the same ...

It is the largest object in the Solar System, but recent studies suggest it was once even twice as large as it is today.

The largest celestial bodies in our solar system that still exist—massive asteroids and minor planets—are thought to be the last vestiges of this era of planetary formation. This is the period ...

Astronomers have discovered a mysterious dwarf planet, 2017 OF201, far beyond Pluto. This discovery challenges existing ...

Researchers from Nagoya City University, Tohoku University, and other institutions have used numerical simulations to ...

“The host filament can shield the young Solar System from stellar feedback, both during the formation and evolution of stars (stellar outflow, wind, and radiation) and at the end of their lives ...

Today's leading theories of planet formation suggest that planets originate ... Most theories hold that planetesimals don't appear in a solar system until their host star has already reached ...

Between 2014 and 2016, the spacecraft circled comet 67P/Churyumov-Gerasimenko, collecting valuable information on comets’ role in the solar system’s formation and evolution. Rosetta was there ...

The two lobes of Arrokoth, the team realized, are strongly suggestive of a "streaming instability model" of formation ... in a specific region of the solar nebula undergoing gravitational collapse.