What did the nonrepeatable nature of the signal lead many scientists to conclude about its origin?
The source was likely terrestrial or located within our own solar system
The failure to relocate the 6EQUJ5 signal by pointing the Big Ear telescope back to the Sagittarius coordinates on subsequent rotations is the primary reason the extraterrestrial hypothesis remains unconfirmed. A dedicated, long-range extraterrestrial beacon would be expected to broadcast continuously or repeat its transmission regularly. Because the signal vanished immediately and was never detected again in that location, many researchers favor explanations involving natural mimics, such as comets, or transient Earth-based interference that happened to sweep across the beam once, rather than assuming a sophisticated alien beacon that only blinked once for us.

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