Here's a breakdown:

* Occultation: This is when one celestial object (like a moon, planet, or even a star) passes in front of another celestial object (usually a star), temporarily blocking the light of the object behind it.

* Dimming: The brightness of the object being occulted decreases because its light is blocked by the object passing in front of it.

Common Examples:

* Lunar occultation: The Moon passes in front of a star, causing it to disappear briefly.

* Solar occultation: A planet passes in front of the Sun, causing a solar eclipse.

Let me know if you want to know more about occultations!