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
nova and supernova rne nova novas classical nova helium nova stellar surface fusion recurrent nova cne recurring nova
nova
WikipediaEntity
Nova