Fatal

I think the point was less about making the messages undetectable as it was about making them unjammable. In order to stop their transmission, we would have to essentially shut down GPS for the entire EU. So you might use that frequency to send critical, must-have messages.

Only Murders in the Building

Yeah I was trying to figure out this as well. It’s about gravitational time dilation. The increased gravity at the center of the sun means that about 25,000 fewer years have passed there than at the surface, since the birth of the sun.