Word of the day: PERIGEE Pronunciation: peri·gee UK/ˈper.ɪ.dʒiː/ and US/ˈper.ɪ.dʒiː/
Meaning:
'Perigee' is an astronomical term that refers to the point in the Moon's orbit (or any object orbiting Earth) where it is closest to the Earth.
Origin and history:
The word "perigee" originates from the Greek word "perigeion", which translates to "near the earth", derived from "peri-" (meaning "around" or "near") and gē (meaning "earth"). It entered English in the late 16th century via French and Latin to describe the point in an orbit closest to Earth.
The term 'perigee' is directly related to geocentric astronomy, especially the orbital studies In ancient astronomy:
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Cultural significance and modern usage:
Media and public interest spike during perigee when the moon appears up to 14% larger and 30% brighter, creating a spectacular, observable event.
The term is rooted in ancient Greek, used by Ptolemy, and historically, the moon's closest approach has been linked in various cultures to heightened emotional states or erratic behaviour ("lunacy").
It marks the peak of gravitational influence, causing higher-than-normal "perigean spring tides".
Interesting facts:
- The Moon's average perigee distance is about 363,300 km (225,623 miles) from Earth.
- A full Moon at perigee is commonly called a 'supermoon', a term made popular by astrologer Richard Nolle in 1979.
- If an object orbits the Sun instead of Earth, the closest point is called perihelion, not perigee.
- The concept of perigee helped refine calculations in classical mechanics after the publication of Philosophiæ Naturalis Principia Mathematica by Isaac Newton.
Examples from literature:
- Outside of that first awkward attempt on the night of the perigee moon to discover Julia Bishop's past, we had never really talked about the reason behind her relocation to California. - 100 Sideways Miles by Andrew Smith
- To the mouth which is bent down to it, it seems a rich, flowery plain; to man in his perigee, a dark world; and to man in his apogee, a glimmering moon.- Johann Paul Friedrich Richter, Hesperus; or, Forty-Five Dog-Post-Days
- She said the moon was in perigee that night, the closest it got to the planet of humans and dogs. - 100 Sideways Miles by Andrew Smith
Synonyms:
- Path
- Pattern
- Rotation
- Trajectory
Antonyms:
- Apogee
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