Zénith is a term that refers to the highest point in the sky directly above an observer. In astronomy, it is used to describe the point where celestial bodies appear at their peak elevation. This concept is important for understanding the movement of stars and planets in relation to Earth. In a broader context, Zénith can also refer to the peak or pinnacle of any experience or achievement. For example, one might say they reached the zenith of their career when they achieved their greatest success. This usage emphasizes the idea of reaching the utmost level in various fields or endeavors.