Which term describes the obscuring of light from a celestial body by the passage of another between it and the observer or its light source?

Which term describes the obscuring of light from a celestial body by the passage of another between it and the observer or its light source?

• A. Eclipse
• B. Conjunction
• C. Occultation
• D. Transit

Answer: (A)

When a foreground object moves between an observer and a light source, it can hide or block the light. This general phenomenon is called occultation. It covers any instance where another body passes in front of the one being observed and obscures its light, not tied to a specific geometry. An eclipse is related but more specific: it involves the Sun, Moon, and Earth and the shadows they cast. Conjunction means two objects appear close together in the sky but aren’t blocking light, and a transit describes a smaller body passing in front of a larger background body and often causing a small dimming rather than a full occultation. So the term that best fits the description given is occultation.

When a foreground object moves between an observer and a light source, it can hide or block the light. This general phenomenon is called occultation. It covers any instance where another body passes in front of the one being observed and obscures its light, not tied to a specific geometry.

An eclipse is related but more specific: it involves the Sun, Moon, and Earth and the shadows they cast. Conjunction means two objects appear close together in the sky but aren’t blocking light, and a transit describes a smaller body passing in front of a larger background body and often causing a small dimming rather than a full occultation. So the term that best fits the description given is occultation.