Scene Context: After an important personal revelation, Talani’s messages become longer, warmer, and more frequent. To Les, it feels as if someone on Earth had suddenly forgotten the limits and cost of private comms with Sagan.
Essence of the Phenomenon: Communication with a spacecraft in deep space is not an unlimited video call. Every private data packet competes with telemetry, medical reports, navigation updates, science data, command sequences, and emergency priorities. Even when transmission is technically possible, it still has to fit into the mission schedule.
Scientific Basis: Modern interplanetary communication relies on the Deep Space Network, NASA’s global network of large antennas at Goldstone, Madrid, and Canberra. This is not “space Wi-Fi,” but a limited infrastructure with defined communication windows, priorities, and scheduling constraints. Access to such channels is planned in advance, and the communication resource itself has a high technical and operational cost: antenna time, transmitter power, telemetry priority, signal delay, and limited bandwidth.
Current Limitations: Even real Martian missions do not have a bottomless data channel. Spacecraft on the surface of Mars often rely on orbital relays, and data return is treated not like home internet, but as a planned mission resource. In addition, the Deep Space Network supports many spacecraft at once, so large-antenna time must be divided among missions, emergency priorities, navigation, and science data packages.
Author’s Assumption: The novel assumes that, for the first crewed mission to Mars, private family messages would be part of crew psychological support, but would not function like an unrestricted everyday messenger. Longer and more frequent messages from Talani therefore suggest that someone on Earth used institutional authority to secure a more stable private family communication window for her within mission protocols.