The phenomenon you're describing is called occultation. This happens when a celestial object, like a star or a planet, passes behind the Moon and is temporarily hidden from view.

Here's a breakdown:

* What happens: The Moon, in its orbit around Earth, passes between the Earth and a distant star or planet. The Moon's larger size and closer proximity to Earth cause it to block the light from the star or planet, causing it to disappear from view.

* How long it lasts: The duration of the occultation depends on the relative positions of the Moon, the star/planet, and the observer on Earth. It can last for a few seconds or even several minutes.

* What you see: As the Moon moves, the star or planet will appear to suddenly vanish behind the Moon's limb (edge). After a short period, it will reappear on the other side.

Occultations are fascinating events that can be observed with the naked eye or with binoculars, providing a unique perspective on the celestial dance of our solar system.