What planets don't have moons?

In our solar system,only two planet don't have moons.The planet closest to the Sun,Mercury,doen't have any natural satellites.Even though Venus is nearly the same size,mass,and distance from the sun as the earth,Venus also does;t have moons.But between 1672 and 1892,a few astronomers saw something near venus that seemed like a moon.In 1884,one astronomer suggested that they had seen a new planet that was in conjuntion with Venus every 1080 days.He named the planet Neith.But later scientist proved that it wasn't a planet at all-astronomers had mistaken distant stars and asteroids as a moon or planet.So Venus is alone in its orbit.

reference from:the book of universe