AFOQT Practice Test

Which planets in our solar system do not have any moons?

1. Earth and Mars

2. Jupiter and Saturn

3. Mercury and Venus

4. Uranus and Neptune

The correct answer is: Mercury and Venus

The planets in our solar system that do not have any moons are Mercury and Venus. This is because both of these inner planets have certain characteristics and positioning that contribute to their lack of natural satellites. Mercury, being the closest planet to the Sun, experiences significant gravitational influence which makes it challenging for it to maintain any moon in a stable orbit. Additionally, any moon that might have once orbited Mercury could have been pulled away by the Sun’s gravity or impacted by other celestial bodies. Venus also lacks moons, and similar issues apply. It has a slow rotation and a thick atmosphere, but there's no significant gravitational force present that would have enabled it to capture or retain a moon. The absence of moons for both of these planets is an interesting aspect of their characteristics, setting them apart from other planets in the solar system. In contrast, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune all have varying numbers of moons, showcasing a diverse range in their satellite systems.