What term refers collectively to the four inner planets of our solar system? Galilean planets terrestrial planets sidereal planets abyssal planets

The correct term is: **Terrestrial planets** **Explanation:** - **Terrestrial planets**: This term refers to the four inner planets of our solar system—**Mercury, Venus, Earth, and Mars**. These planets are characterized by their solid, rocky surfaces. - **Galilean planets**: This is not a standard term in astronomy. However, the "Galilean moons" refer to the four largest moons of Jupiter—**Io, Europa, Ganymede, and Callisto**—discovered by Galileo Galilei. - **Sidereal planets**: "Sidereal" relates to stars or the measurement of celestial objects' positions relative to the stars. It is not used to categorize planets based on their location in the solar system. - **Abyssal planets**: This term is not recognized in standard astronomical nomenclature. So, **terrestrial planets** is the appropriate term for the four inner planets of our solar system.