When we found the transmitters in the Vega system, they were already perfected.
Maybe they didn't grow up in the Vega system.
But you're absolutely right; we don't have to guess whether the source is in the Vega system.
Everybody knows now that there's some kind of intelligent life in the Vega system.
Plus maybe a year to get up to light speed and a year to decelerate into the Vega system.
The civilization in the Vega system seemed very dedicated.
She had even done a spot check on some of the footage after they had left the Vega system.
However, there is already contact with the eighth planet of the Vega system.
There I should be in a good position to find an opportunity to fly to the Vega system.
In this case it was only necessary that they actually reach the Vega system.