A crane moves the Cosmic Origins Spectrograph or COS toward the Orbital Replacement Unit Carrier where it will be installed.

In the Payload Hazardous Servicing Facility at NASA's Kennedy Space Center in Florida, a crane moves the Cosmic Origins Spectrograph, or COS, toward the Orbital Replacement Unit Carrier where it will be installed. The carrier will be placed in space shuttle Atlantis' payload bay for the Hubble servicing mission, STS-125, targeted to launch in mid-May. Installing the COS during the mission will effectively restore spectroscopy to Hubble’s scientific arsenal, and at the same time provide the telescope with unique capabilities. COS is designed to study the large-scale structure of the universe and how galaxies, stars and planets formed and evolved. It will help determine how elements needed for life such as carbon and iron first formed and how their abundances have increased over the lifetime of the universe. Photo credit: NASA/Kim Shiflett