The orbital environment is the physical setting around Earth where spacecraft operate. It includes microgravity, hard vacuum, radiation, rapid temperature swings, and long communication paths to and from the ground. For cyber security, this matters because a space system is not just a computer in a box: its software, electronics, and communications are shaped by conditions that can cause faults, delay response, and limit maintenance. A command that is safe on Earth may fail or behave differently once a satellite is in orbit.
In real attacks and defenses, the orbital environment changes what security engineers must protect. Adversaries may try to spoof commands, jam radio links, or exploit weak authentication over satellite channels, while defenders use secure boot, signed updates, command validation, redundancy, and telemetry monitoring. Radiation-induced bit flips and component degradation also force robust error correction and fault-tolerant design. In practice, securing orbital systems means defending both the software and the harsh environment around it.