Is Mercury the only planet without a moon?
Mercury and Venus are the only planets without moons. The outer Solar System includes Jupiter, Saturn, Uranus, Neptune and Pluto and the rest of the moons. More moons are discovered each year in the outer Solar System by astronomers using ever more powerful equipment.
Which planet has no moon and why?
Venus and Mercury are the only planets in our solar system with no moons. That's primarily because they're too small and too close to the Sun to retain a moon, and Venus's motion is too unusual. The other planets and dwarf planets in our solar system have at least one moon, but Mars may lose one in 10-50 million years.
Do some planets have no moon?
Mercury and Venus Neither of them has a moon. Because Mercury is so close to the Sun and its gravity, it wouldn't be able to hold on to its own moon. Any moon would most likely crash into Mercury or maybe go into orbit around the Sun and eventually get pulled into it.
Does Uranus have a moon?
TitaniaOberonUmbrielMirandaArielPuck Uranus/Moons
Does Neptune have a moon?
TritonThalassaHippocampNesoNereidDespina Neptune/Moons
Does Mars have a moon?
PhobosDeimos Mars/Moons Mars' moons are among the smallest in the solar system. Phobos is a bit larger than Deimos, and orbits only 3,700 miles (6,000 kilometers) above the Martian surface. No known moon orbits closer to its planet. It whips around Mars three times a day, while the more distant Deimos takes 30 hours for each orbit.
Does Mercury have a moon?
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.
Does Venus have a moon?
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.