SOLAR SYSTEM

Detailed explanation-1: -More than 150 asteroids are known to have a small companion moon (some have two moons). There are also binary (double) asteroids, in which two rocky bodies of roughly equal size orbit each other, as well as triple asteroid systems.

Detailed explanation-2: -1 Ceres-The largest and first discovered asteroid, by G. Piazzi on January 1, 1801. Ceres comprises over one-third the 2.3 x 1021 kg estimated total mass of all the asteroids.

Detailed explanation-3: -While most of the planets have moons, and some of the Kuiper belt objects and even asteroids have natural satellites that orbit them, there are no known “moons of moons” out there.

Detailed explanation-4: -Asteroids have no atmosphere, but many are large enough to exert a gravitational pull-some, in fact, have one or two companion moons, or they form binary systems, in which two similarly sized asteroids orbit each other.