Those that are closer to the Sun. It may refer either to those that are closer to the Sun than Earth (i.e., Mercury and Venus), or to the FOUR innermost planets (Mercury, Venus, Earth, Mars), which share certain characteristics.
Planets orbiting the Sun closer than the asteroid belt (Mars, Earth, Venus, Mercury)
none of the inner planets
Inner planets. are inner & outer planets. are outer
The inner planets are Mercury, Venus, Earth, and Mars. They are "inner" because the are the first 4 planets from the Sun.
After the inner planets you get the outer planets.
Inner planets
the inner planets are sometimes called Terrestrial Planets
Inner planets are terrestrial planets outer are jovian planets
the inner planets
I hesitate to admit that I was raised on one of the inner planets. The inner planets are not gaseous, like the outer planets.
All the inner planets are terrestrial planets.
outer planets are gas giants whille inner planets are just rocky planets. that includes that outer planets have significant amount of mass than the inner planets
because inner planets are hot and outer planets are cold