Examples of angular resolution, achievable with the VLT under normal circumstances, with Adaptive Optics and with interferometry. The VLT Delay Lines and the principle of interferometric observations. The VLT Delay Line and its components. Science perfomance specifications for the VLT and its subsystems. Very distant galaxies.
Solar system objects.
The concept of data flow. To improve the scientific performance, the VLT will be operated in a way that ensures the highest possible quality of the data obtained.