Astrophysicists have been grappling with the question of how water arrived on our young planet for decades. One of the ...

Inner-ring planetesimals produced the inner solar system’s planets (bottom), and planetesimals from the middle and outer rings produced the outer solar system planets and Kuiper Belt (not shown).

The research reveals that high-mass planets—or in other words, terrestrial planets—tend ... form around star systems that formed around the inner regions of the galaxy. Here, the supply ...

Because many close-matching simulations had the planet-like object swooping through the inner solar system, the researchers created an additional 10,000 simulations including the terrestrial ...

In our solar system, all of the known terrestrial rocky planets are grouped together in the inner solar system while all of the known gas and ice giants are grouped together in the outer solar system.

Earliest inner solar system planetesimals shaped the inventory of moderately volatile elements in terrestrial planets.

USC scientists have made a groundbreaking discovery about the nature of the Earth’s enigmatic inner core, revealing for the ...

Most terrestrial planets have atmospheres, but the conditions on their surfaces would not allow humans to survive there. Venus is the hottest planet in our solar system (despite being further from ...