Which four letter word beginning with N is a star showing a sudden large increase in brightness, then gradually returning to its original state over a period of weeks to years?
Novas Nova Nova and Supernova Classical nova Recurring nova RNe Helium nova Stellar surface fusion Recurrent Nova Recurrent nova CNe
recurring nova nova and supernova rne stellar surface fusion nova classical nova recurrent nova novas helium nova cne
nova
WikipediaEntity
Nova