Bracewell

One such outside-the-box thinker was electrical engineer Ronald Bracewell and his concept of a communicating probe.

Here's where Bracewell saw an intriguing concept.

Bracewell's idea was simple.

Bracewell took his speculation one step further by considering that such a probe may already be lurking somewhere in the dark recesses of our solar system,

In a manner just like Bracewell's concept, the Vega aliens decide to respond by bouncing Hitler's speech back to its initial source,

Just consider for a moment how closely long delay echoes resemble Bracewell's concept for interstellar communication,

Could some of these echoing Bracewell probes be what Beatrice has detected on the Palomar plates?