A doomed satellite

Overheating is a game mechanic in Space Agency that occurs when parts enter the atmosphere of a particular planet such as HOM or GOL and end up overheating and turning red in colour until they explode and trigger a chain reaction of explosions among interconnected or nearby parts, similar to ones caused by collisions or self-destructing parts. It is survivable if you do not stay within the atmosphere for long periods, and affected parts will cool down.

However, parts specifically designed to re-enter an atmosphere (such as the Orion Crew Capsule or Atmospheric Probe) instead trigger the re-entry sequence, even if the camera is not focused on it, unless still attached to parts not designed for such.

Re-entry vehicles have to be stabilised while descending down an atmosphere, otherwise they will also overheat and explode.

Although SOL does not have a usual atmosphere, it will still vaporize any part that gets too close, which makes both re-entry and landing impossible.

Certain payloads (such as the Automated Transfer Vehicle), when not protected by any fairing during launch, will overheat and explode as the rocket reaches full speed.