How Do You Spell EVECTION?

Pronunciation: [ˈiːvkʃən] (IPA)

Evection is a term used in astronomy to describe the variation of the Moon's longitude caused by the Sun's gravitational pull. The correct spelling of the word is [ɛˈvɛkʃən], with the first syllable pronounced like "eh" and the second syllable pronounced like "vek-shun." The double letter "v" in the second syllable reflects the Latin origin of the word, which comes from "evectionem" meaning a carrying away. The correct spelling and pronunciation of scientific terms is essential for clear communication and accurate understanding.

EVECTION Meaning and Definition

1. Evection is a phenomenon in astronomy and celestial mechanics that describes the variation in the position of a satellite or celestial body in its orbit around another body due to the gravitational influence of a third body. Specifically, it refers to the periodic perturbation caused by the gravitational attraction of the Sun on the Moon's orbit around the Earth.

   In the traditional geocentric model of the solar system, the Moon's path around the Earth is not a perfect circle but rather an ellipse. The gravitational pull of the Sun causes the shape of this orbit to deviate from a perfect ellipse, resulting in oscillations and irregularities in the size and orientation of the Moon's orbit. These changes are known as the evectional inequalities.

   Evection was first discovered by the ancient Greek astronomer Hipparchus in the 2nd century BC and later further studied by Copernicus, Kepler, and various other astronomers. It is an important factor to consider when predicting the motion and behavior of celestial bodies.

   In modern times, evection is less significant due to the refinement of gravitational theories and the ability to accurately measure and model lunar motion. However, it still plays a role in precise astronomical calculations and satellite orbits. Overall, evection is an important concept in celestial mechanics that helps explain the complex interactions and motions of celestial bodies in our solar system.

2. In astron., an inequality of the moon's motion in its orbit, due to the attraction of the sun; the libration of the moon.

   Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.

Common Misspellings for EVECTION

• wvection
• svection
• rvection
• 4vection
• 3vection
• ecection
• evwction
• evsction
• evdction
• evrction
• ev4ction
• ev3ction
• evextion
• evevtion
• eveftion
• evedtion
• evecrion
• evecfion
• evecgion

Etymology of EVECTION

The word "evection" has its etymology rooted in Latin. It derives from the Latin word "evectionem" which means "a dragging up, carrying out". This Latin term was adopted in astronomy to refer to a periodic variation or irregularity in the motion of the moon, specifically related to its orbital eccentricity. Over time, the word "evection" was borrowed into English to retain the same meaning in the field of astronomy.

Plural form of EVECTION is EVECTIONS