Why Didn't The Prometheus Detect The Signal?

[SM]

He wanted to meet his maker.

[Local Trouble]

If the signal was already coming from LV-426 before the Prometheus mission began, then that means the derelict and its eggs were there long before David "created" the alien on Paradise in AC.

SM?

[SM]

Prolly.

Depends on where Riddles takes the prequels and if the Derelict figures.

[Local Trouble]

Is SM expecting time travel?

[SM]

Hope not.

[Local Trouble]

I'm worried.