UNIVERSE
SATELLITESICY BODIES
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Detailed explanation-1: -Earth has one large natural satellite, the Moon. Moons are called natural satellites because they orbit planets.
Detailed explanation-2: -Of the terrestrial (rocky) planets of the inner solar system, neither Mercury nor Venus have any moons at all, Earth has one and Mars has its two small moons. In the outer solar system, the gas giants Jupiter and Saturn and the ice giants Uranus and Neptune have dozens of moons.
Detailed explanation-3: -Although the Moon is Earth’s only natural satellite, there are a number of near-Earth objects (NEOs) with orbits that are in resonance with Earth. These have been called “second” moons of Earth or “minimoons".
Detailed explanation-4: -University of Hawaii Institute for Astronomy scientists report their discovery of 11 new satellites of Jupiter, all members of Jupiter’s outer “irregular” satellite system. These observations double the number of such moons known to orbit the planet and are the largest number of satellites ever discovered at one time.