phobos
Deimos is the smallest moon of Mars with a diameter of only 12.6 km
It is Mars' smallest moon
Deimos, the smaller of the two moons of Mars, is the smallest moon in the solar system to orbit a terrestrial planet. It is irregular in shape but averages about 12 kilometers or about 9 miles across.
The smaller and more distant a moon is, the harder it is to detect. The smallest moon so far discovered is Aegaeon, a moon of Saturn with a diameter of around half a kilometre.
Moon, Mercury, Mars, Venus, Earth
Pluto's moon Nix is thought to smaller than the other small moon Hydra, but the two are very close in size. There is a large margin of error possible, with the two moons ranging from 50 to 150 km in diameter.
Venus and Mercury have the least moons in our solar system with none at all!
Nebula, The solar system, The sun, Jupiter, Earth, Mars, The moon, Pluto, Neutron Star
From largest to smallest: Nebula, Solar System, Sun, Jupiter, Earth, Mars, Moon, Pluto, neutron star.
Mars is a planet the Moon is not. Mars orbits the Sun-the Moon does not.
The biggest object in the solar system is the sun, and the smallest is Pluto
The planets and Earth's Moon arranged in order of increasing equatorial diameter are: Earth's Moon, Mercury, Mars, and Venus. The Moon has the smallest diameter, followed by Mercury, then Mars, and finally Venus, which has the largest diameter among this group.