'astronomy-related' originates from the word 'astronomy', which comes from the Greek word 'astronomia', where 'astro-' meant 'star' and '-nomia' meant 'law or culture'.

'astronomia' transformed into the Latin word 'astronomia', and eventually became the modern English word 'astronomy'.

Initially, it meant 'the law or culture of stars', but over time it evolved into its current meaning of 'the scientific study of celestial objects'.