👉 "Extraviolet" is a term used in astronomy and astrophysics to describe a star that emits a color other than red or violet. In this context, "extraviolet" refers to a star with an intensity of light that is not typically associated with the colors of the visible spectrum. The term was introduced by astronomer and astrophysicist John Herschel in 1837, who observed that some stars in the constellation Canis Major had a color
