Cosmic Origins Spectrograph (COS) will be the most sensitive ultraviolet spectrograph ever flown on Hubble. COS will probe the "cosmic web" - the large-scale structure of the universe whose form is determined by the gravity of dark matter and is traced by galaxies and intergalactic gas. COS will explore how the "cosmic web" evolved from ancient times. COS will also sample the chemical content and physical state of gas in distant galaxy halos, providing important insight into the building process of early galaxies and the production of elements heavier than hydrogen and helium over cosmic time. Required to accomplish these goals is the extraordinary sensitivity of COS's far-ultraviolet channel—a factor more than 30 times greater than that of previous spectroscopic instruments for the detection of extremely low light levels. A two-fold enhancement will be offered by COS's near-ultraviolet channel. To install the COS instrument into the Hubble Space Telescope, he Servicing Mission 4 astronauts will remove the Corrective Optics Space Telescope Axial Replacement (COSTAR) instrument (installed during Servicing Mission 1 in 1993, to correct for Hubble's spherical aberration) and then install COS in its place.
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NASA ID
GSFC_20080822_HST_m10232_COS_EVA
Date Created
August 22, 2008
Center
GSFC
Media Type
video
Location
Goddard Space Flight Center
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Subtitles
KENNEDY SPACE CENTER, FLA. - In KSC's Vertical Processing Facility, Louise Kleba of the Vehicle Integration Test Team (VITT) and engineer Devin Tailor of Goddard Space Flight Center examine the Pistol Grip Tool (PGT), which was designed for use by astronauts during spacewalks. The PGT is a self-contained, micro-processor controlled, battery-powered tool. It also can be used as a nonpowered ratchet wrench. The experiences of the astronauts on the first Hubble Space Telescope (HST) servicing mission led to recommendations for this smaller, more efficient tool for precision work during spacewalks. The PGT will be used on the second HST servicing mission, STS-82. Liftoff aboard Discovery is scheduled Feb. 11.
Jan 22, 1997
KENNEDY SPACE CENTER, FLA. - STS-82 Mission Specialist Gregory J. Harbaugh, at top, inspects part of the Flight Support System during the Crew Equipment Integration Test (CEIT) at KSC's Vertical Processing Facility. Harbaugh and the other six STS-82 crew members will conduct the second Hubble Space Telescope (HST) servicing mission aboard the Space Shuttle Discovery. Harbaugh will be one of four spacewalkers. Liftoff aboard Discovery is scheduled Feb. 11.
Jan 22, 1997
KENNEDY SPACE CENTER, FLA. - STS-82 Mission Specialist Steven A Hawley stands beside part of Discovery's Remote Manipulator System (RMS) arm, at right, which he will operate for the capture, berthing and redeployment of the Hubble Space Telescope (HST). The robotic arm also will be used as work platform for the four spacewalkers. Hawley is the prime RMS operator on the flight, which will be the second HST servicing mission. He and the other six members of the crew are making a final inspection of the payload at Launch Pad 39A before launch. STS-82 is scheduled for liftoff on Feb. 11 during a 65-minute launch window that opens at 3:56 a.m. EST.
Feb 7, 1997
Various views of HST prior to grapple
Dec 21, 1999