Small amounts of rocky materials are only found deep in the cores of Jovian planets. In the solar system, Jovian planets are located farther from the sun than terrestrial planets, and are ...

In the case of Venus' apparent lack of a magnetosphere, there are four possibilities ... is transformed into a magnetic field," O'Rouke explained. "In terrestrial planets, metallic cores can host ...

Narrator: As the solar system grew, four rocky planets: Mercury, Venus, Earth and Mars, were created closest to the Sun. Made of rocks and metals, they have solid surfaces and a central core of ...