I entered a solar system with my ship that had two asteroids. Immediately my sensors officer started repeating this message every couple seconds.
Workaround: Taking control of the sensor console using my captain's chair seems to suppress the message.
Code:
Sir, sensors have detected a large asteroid. It is hazardous to space traffic and world ecosystems.
Workaround: Taking control of the sensor console using my captain's chair seems to suppress the message.