This is the 6872nd most frequent Russian word.
авроры
"Авроры" is the plural form of "Аврора," meaning "Auroras" (natural light displays in the sky) or can refer to the Russian cruiser "Aurora" in historical contexts.
In this sentence, 'авроры' refers to the natural phenomenon of the aurora, specifically the northern lights.
Мы наслаждались красотой северной авроры.
We enjoyed the beauty of the northern aurora.
Here, 'авроры' metaphorically represents significant new events or beginnings, compared to the dawn of a new era.
Авроры нового времени заставили нас задуматься об Истории.
Auroras of the new era made us think about History.
In this case, 'Аврора' refers to the name of a famous historic cruiser from Russian history, and 'авроры' is used in the context of its attribution or dedication.