English: Astro-1 mission in orbit (during STS-35 Endeavour Shuttle flight).
STS-35 Astronomy Laboratory 1 (ASTRO-1) telescopes, in onorbit operating configuration, are documented in the payload bay (PLB) of Columbia, Orbiter Vehicle (OV) 102. To the right of the ASTRO-1 components is the Orion nebula. Three ultraviolet telescopes are mounted and precisely coaligned on a common structure, called the cruciform, that is attached to the instrument pointing system (IPS). Visible here are the star tracker (S TRK) (silver cone at the far left), the Hopkins Ultraviolet Telescope (HUT), and the Wisconsin Ultraviolet Photo-Polarimeter Experiment (WUPPE) (at top right).