The word "perigees" is spelled with a double "e" at the end, but it is pronounced with only one "e" sound. This is due to the fact that the second "e" in "perigees" is part of a silent suffix, "-es," which is added to form the plural of the noun "perigee." The correct phonetic transcription for "perigees" is /pɛrəˌdʒiz/, where the stress falls on the second syllable. This word refers to the point in the orbit of the moon or a satellite that is closest to the earth.
Perigees is the plural form of "perigee," a term commonly used in astronomy to describe a specific point in the orbit of a celestial body – such as the Moon or a satellite – when it is closest to the object it orbits around. It is a compound word derived from the Greek words "peri," meaning "around," and "gee," meaning "the Earth." Perigee is essentially the opposite of apogee, which refers to the farthest point in an orbit from the object being orbited.
In the case of the Moon, perigee specifically signifies the point when the Moon is nearest to the Earth within its elliptical orbit. This results in the Moon appearing larger and brighter in our skies, commonly known as a "Supermoon." The distance between a celestial body and its closest point to the object it orbits can vary, leading to fluctuations in the size and the brightness of the celestial body when it reaches perigee.
Perigees are significant in understanding the orbital mechanics and celestial motion since they determine the closest proximity a celestial body can reach during its elliptical trajectory. These astronomical phenomena have captivated humanity throughout history, leading to observations, measurements, and discoveries that further our knowledge of the cosmos.
The word perigee comes from the Greek word perigeion which means near the Earth. It is derived from the combination of the prefix peri- meaning around or near and the Greek word gaia meaning earth. Perigee refers to the point in the orbit of the Moon or any satellite when it is closest to the Earth. The plural form of perigee is perigees.