The phrase "nearing the meridian" refers to the point at which a celestial body is at its highest point in the sky. Some synonyms for this phrase include "approaching culmination," "coming to the zenith," "ascending to the apex," and "reaching the pinnacle." Other possible options might include "climbing to the top," "surging towards the summit," or "peaking at the acme." Regardless of the terminology used, the concept remains the same: at this moment, the celestial object in question is at its most visible and prominent position in the sky, offering viewers a clear and stunning look at its features and characteristics.