Advanced Camera for Surveys – This will consist of three electronic cameras and a complement of filters and dispersers that detect light from the ultraviolet at 1,200 angstroms to the near infrared at [..]

Aft Shroud Latch Repair (kits) - This kit will fix door latches in the aft shroud area of the Telescope that have been damaged by extreme temperature changes and high torques.

Berthing and Positioning System – This is the unit that holds and manoeuvers HST while it is docked with the orbiter. The BAPS can position the telescope at a variety of angles and rotate it a full 36 [..]

BAPS Support Post – This post is installed to keep the BAPS immobile during activities which generate high torques on the HST, for example reboost.

A heavy logistics global transport aircraft that provides a massive strategic airlift and express delivery of padded or oversized cargo as well as passengers. It has transported HST flight hardware an [..]

Cosmic Origins Spectrograph - Fourth Generation Spectrometer. COS is an ultraviolet spectrograph optimised for observing faint point sources with moderate spectral resolution

Corrective Optics Space Telescope Axial - Second Generation Corrective Optics. COSTAR is not an actual instrument, but a system of mirrors that refocus the light and correct for the aberration from HS [..]

Onboard Digital Fixed Point 2's complement 24-bit word Rockwell computer module. This is the main computer which controls the attitude (orientation) of the Hubble Space Telescope.

European Space Agency

Extravehicular activity; outside the spacecraft; activity in space conducted by suited astronauts. This is also known as a spacewalk.