The fate of the Dawn Star and the Archangels

Joat42 wrote:

Louis R wrote:Wasn't one of them Blue?

quote="DMcCunney"
On that line, I was tickled by Fred Pohls "Heechee" novels. Humanity is traveling the stars using technology left behind by a long-vanished race called the HeeChee. We eventually learn where the HeeChee went. They detected a threat so enormous that they did did try to dive down a hole and pull it in after them, but the holes they dove into were black.
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Dennis

/quote
One of the navigation controls for the star you wanted to travel to was color coded, maybe that's why you think of the black hole as blue.

OrlandoNative wrote:No. It's "brown eyes blue".

DMcCunney wrote:

n7axw wrote:If we take our hint from RFC's post, the Gbaba aren't sweeping out looking for potential threats. The possibility Safehold was guarding against by going bush was that of hot pursuit in search of escapees from the TF's destruction. Once the period had passed in which that would be a danger, Safehold would be free to rebuild, cautiously, of course. IIRC, that period was 500 years.

There would be no concern that radio or electric signals would get back to give Safehold away. By the time they could make the trip, they would have faded below the galactic noise floor.

I'm not concerned that electromagnetic radiation from Safehold would attract the Gbaba. Given the apparent distance, I agree it would be below the noise floor.

But the Gbaba encountered humanity, swatted every vessel they encountered, then went looking for the nests. One by one, they found every Earth colony and destroyed it, and finally found and destroyed Earth.

What I'm interested in is how they found and destroyed the colonies and finally Earth. What sort of trail were they following?
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Dennis