An object eight times the mass of Jupiter may have swooped around the sun, coming superclose to Mars' present-day orbit before shoving four of the solar system's planets onto a different course.

Exoplanets have captured the imagination of the public and scientists alike and as the search continues for more, researchers have turned their attention to the evolution of metallicity in the Milky ...

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).

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

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

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.

But once the star ignites, the inner layers of dust heat up dramatically ... These rocky bits eventually coalesced to form the terrestrial planets. However, at a distance of around 4 astronomical ...

These situations allows scientists to investigate the usually hidden interiors of terrestrial worlds. Two teams of astronomers, including the observed planet's discoverers, now intend to join up ...

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 ...