The Copernican Principle - named after the 16th-century Polish astronomer Nicolaus Copernicus - says that there are no 'special' observers. In other words, we can explain how the universe works without assuming that the Earth, or anywhere else, occupies a central or special position.
I'm an English teacher (I've taught in Argentina, the Congo, Indonesia, Japan, Mexico, New Zealand, Spain, Turkey and the UK) but my degree is in astrophysics. Students occasionally ask me if there is any connection between the two fields, and I think there is: the Copernican Principle can be applied to the English language.
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