heliocentric
hee-lee-oh-SEN-trik
/ˌhiː.li.əʊˈsen.trɪk/
Having or representing the sun as the center, particularly regarding the solar system.
Refers specifically to astronomical models that position the sun at the center of planetary orbits.
The story behind the word. Coined in the 17th century from the Greek root 'helios' (sun) and 'kentron' (center). Aristarchus of Samos proposed a heliocentric idea in ancient Greece, but it was suppressed by geocentric tradition for nearly two millennia.
Word relationships
- sun-centered: Sun-centered is the plain English equivalent, whereas heliocentric is the formal scientific term.
- geocentric: Geocentric places the Earth at the center of the universe or solar system.
Commonly confused with
- egocentric: Egocentric means self-centered, whereas heliocentric means sun-centered.
Word family
- heliocentrism (noun): The astronomical model placing the Sun at the center
Collocations
- heliocentric model
- heliocentric universe
- heliocentric theory
- heliocentric system
Example sentences
- "Copernicus published his heliocentric model in 1543, dethroning the ancient geocentric view of the cosmos." History of astronomy
- "Accepting a heliocentric universe required a radical rethinking of humanity's place in creation." Scientific revolution
Memory hook
HELIOS is the Greek sun god; heliocentric means the sun sits in the center. Sun at the center.
When not to use
Do not use metaphorically for self-centered people (use 'egocentric').
Fun facts
- Aristarchus of Samos suggested heliocentrism in 270 BCE, but his work was ignored because geocentric math seemed to explain planetary positions well enough at the time.
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