Semnalele misterioase, numite de astronomi explozii radio rapide (Fast Radio Bursts), apar pentru câteva milisecunde. Semnalele FRB sunt emisii radio care apar temporar şi aleatoriu, ceea ce le face nu numai greu de găsit, dar şi de studiat.
Din acest motiv unii speculează ca ele ar putea proveni de la orice, de la coliziunea stelelor până la mesaje create în mod artificial.
„Această descoperire extraordinară indică ori un fenomen astronomic necunoscut sau neobişnuit sau ar putea arăta faptul că există o vastă reţea de comunicare extraterestră, iar Universul este plin de forme de viaţă inteligenta”, a spus Nigel Watson, autorul cărţii „UFO Investigations Manual”.
Deocamdată semnalele FRB rămân un mister. Acestea vor necesita studii şi observaţii suplimentare in viitor pentru a explica provenienţa lor.
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