They are small
Mercury is the smallest of the eight planets.
Mercury is the smallest of the eight official planets, then there are dwarf planets that are smaller.
Mercury is the smallest of the terrestrial planets.
The 4 smallest planets are also the 4 most inner planets: Mercury, Venus, Earth and Mars.
Mercury is one of the four inner terrestrial planets, or rocky planets. It is the smallest of the four and closest to the sun. It is also the smallest of all eight planets.
Mercury is the smallest planet of all.
The smallest gas planet is Neptune.
presedent kennedy
Of the Jovian (gas giant) planets, Neptune is the smallest while Jupiter is the largest.
Order of planets from largest to smallest: Jupiter, Saturn, Uranus, Neptune, Earth, Venus, Mars, Mercury and smallest Pluto.
the smallest is Pluto and the biggest is Jupiter
The two other common names for celestial bodies are planets and moons. Planets are large objects that orbit around stars, while moons are natural satellites that orbit around planets.