1.   A rocket rising into the air presents a clear target, and satellites can easily spot its hot exhaust plume.

2.   His specialty turned out to be the development of control vanes in the fiercely hot exhaust plume of the rocket motor.

3.   Lumbering across the sky, the mammoth plane with four long white exhaust plumes confused Northern Alliance soldiers here at first.

4.   Or it could be a barely perceptible exhaust plume that shows a diesel generator is providing power inside.

5.   The telescope was to be aimed later toward a shuttle jet to gather ultraviolet images of exhaust plumes.

6.   The telescope was aimed later toward a shuttle jet to gather ultraviolet images of exhaust plumes, and then placed back in the cargo bay.