Venus

Venus is both the hottest and second closest planet orbiting Sun.

No Moons
Venus is one of the two planets in the Solar System (the other being Mercury) and here's a theory on why. When Venus was young, it crashed into a Moon sized object and the debris made a moon orbiting Venus, but Venus's rotation slowed down. Later on, another object hit Venus, causing Venus's rotation to be very slow, and that caused a disturbance in the orbit of the moon, so the moon couldn't stay and floated away.