Our solar system contains a central star with eight planets, dwarf planets, moons, comets and asteroids.

Other dwarf planets in the region have been discovered in the years since Pluto’s reclassification, including Eris, Haumea and Makemake, all of which have their own moons, according to NASA.

Planets, dwarf planets, moons, asteroids and comets are being carefully examined and explored by means of highly sophisticated remote sensing and innovative in-situ missions to answer three ...

But, Hygiea is missing a large impact crater normally found on asteroids ... as a dwarf planet is new. It orbits the Sun, and not another planet, so that rules it out from being a Moon.