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 ...

Mercury ' s inner core is solid and about the same size as Earth ... these new findings will help them better understand how rocky planets change over time in the solar system.

These planets are relatively small in size and in mass. A terrestrial planet has a solid rocky surface, with metals deep in its interior. In the solar system, these planets are closer to the sun ...

An international team of astronomers have used the NASA/ESA/CSA James Webb Space Telescope to provide the first observation of water and other molecules in the inner, rocky-planet-forming regions ...

But no-one has previously been able to see what these solid cores are like. Now, a team of astronomers has discovered what they think are the rocky innards of a giant planet that's missing its ...

The system is called K2-360 and it has two known planets K2-360 b and K2-360 c. The innermost orbits the star in just 21 hours. It is an ultra-short period super-Earth, rocky but larger than our ...