General Information:

The Astro-2 observatory is flown on the Space Shuttle and consists of three separate instruments. All of these instruments work in the ultraviolet part of the spectrum which can only be accessed by putting the instruments above the atmosphere of the earth. These three instruments are:

The instrument cluster is contained in a single unit called the instrument pointing system, pictured here:

Adjustments to the instrument pointing system are made by the mission crew and are critical to the overall scientific success of this flight.

The Electronic Universe Project