aurora

the word 'aurora' entered english directly from latin, preserving both its spelling and its core meaning. in roman mythology, aurora was the goddess who renewed herself each morning and flew across the sky to announce the arrival of the sun. the scientific term for the luminous atmospheric display, the aurora borealis (northern lights) or aurora australis (southern lights), was coined in the 17th century by galileo, who poetically named them after the goddess of the dawn due to their radiant, light-filled appearance. thus, the word's journey connects an ancient personification of daybreak to a modern description of one of nature's most spectacular light shows.

this is a simplex word. it is a direct borrowing from latin, where it was the name of the goddess of the dawn. the latin word 'aurora' is derived from the proto-italic ausōs, which in turn comes from the proto-indo-european root h₂éwsōs, meaning "dawn" or "morning light."