There are actually nine planets in our solar system.
Yes, it was the smallest of the nine planets until reclassified as a dwarf planet in 2006. Now it is the second largest of the five dwarf planets, while mercury is now the smallest of the eight major planets.
Mercury is the smallest of the eight planets.
Mercury is the smallest of the eight planets, but is the closest. The furthest planet is Neptune, but its not the smallest.
Mercury is the smallest of the eight official planets, then there are dwarf planets that are smaller.
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.
One cannot say for sure if it is the smallest planet in space, but it is the smallest planet in our Solar System.
Mercury is the smallest of the eight planets in our solar system, with a diameter of 4880km.
Titan is the largest moon of Saturn. The smallest of the eight planets is Mercury.
Neither. Of the eight planets its the second smallest after Mercury.
Pluto used to be the smallest planet, but it's not a planet any more! That makes Mercury the smallest planet in our Solar System. The second smallest planet in the Solar System is now Mars, measuring 6792 km across.
Mercury, with a mass of 0.055 times that of the Earth.Mercury is the smallest of the eight planets, and has the lowest mass.
Pluto is no longer classified as a planet - it is now officially (by the IAU) considered a "dwarf planet". The smallest of the eight remaining planets is Mercury.