aberration

a state or condition markedly different from the norm

The act of wandering; deviation, especially from truth or moral rectitude, from the natural state, or from a type.

Latin 'ab-' apart + 'errare' to wander

“He seems the only calm man to be found in the hall--but is the calm aberration?”

— Winston Churchill, Project Gutenberg Complete Works of Winston Churchill

“The stellar movement proved too insignificant for his telescope, but he instead discovered the aberration of light and the nutation of the Earth's axis.”