Yes, it is. In fact, it is the closest planet to the sun.
inner planet.
Mercury is an inner planet. It does not have any moons.
Mercury is an inner planet because it is the closest one to the sun. Inner planets: Mercury Venus Earth Mars
Mercury
Mercury is the innermost planet. Therefore, it would be an inner planet.
Mercury is an inner planet because it is the closest one to the sun. Inner planets: Mercury Venus Earth Mars
Mercury is the inner planet with the most mass.
mercury
The inner planets are Mercury, Venus, Earth, and Mars. There is also the Sun
Mercury
It's Mars that is the biggest inner planet
Mars is an inner planet, as is Mercury, Venus, and Earth.