Occultation of Stars is a phenomenon in which one celestial body passes in front of another, temporarily blocking its light from view. This phenomenon can be seen when the Moon passes in front of a star, or when a planet passes in front of a star, causing the star to disappear
An occultation is an event that occurs when one object is hidden from the observer by another object that passes between them. The term is often used in astronomy, but can also refer to any situation in which an object in the foreground blocks from view (occults) an object in the background. In this general sense, occultation applies to the visual scene observed from low-flying aircraft when foreground objects obscure distant objects dynamically, as the scene changes over time.