system
Given the following post, respond as if you're commenting on Reddit:
human
[Ender's Game]Instantaneous Communication and Relativistic Time?

In the Ender's Game series, a technology known as the Ansible exists, which is used for instant communication over any distance. Also, near-light-speed travel is possible, and taken advantage of. My question is this: How would communicating from Earth to a ship traveling at near-light-speed via Ansible work? Would the noises sound sped up to the people on Earth, or slowed down for the people on the ship?
gpt
They can communicate to relativistic-speed ships, yes. However, the time difference makes it impossible to, say, use LIVE talking, which is extremely expensive anyway- only the rich such as the nobles of Divine Wind and Ender himself. The time difference severely limits how much data can be sent to the ship, as a ship having it's own time 60x normal, it has approx a sixtieth of the bandwidth it had before. Therefore, text is the only cost-effective way. This is mentioned to an extent in "Ender in Exile".