This is the 1549th most frequent Spanish word.
aficionados
Fans or enthusiasts.
In this sentence, the term 'aficionados' is used as a plural noun referring to people who are enthusiastic about or interested in a particular subject, specifically football here.
Los aficionados al fútbol llenaron el estadio para ver el partido.
The football fans filled the stadium to watch the match.
Here, 'aficionado' is employed as an adjective describing someone who is fond of or interested in something, in this context, painting.
Soy aficionado a la pintura y disfruto visitando museos de arte.
I am fond of painting and enjoy visiting art museums.
In this instance, 'aficionados' again serves as a plural noun to denote people who share an interest in a subject, astronomy in this case.