![]() ![]() A Solid State Recorder (SSR) to replace one of Hubble’s data recorders (an SSR is more flexible and can store 10 times more data).A refurbished Fine Guidance Sensor - one of three essential instruments used to provide pointing information for the spacecraft, to keep it pointing on target, and to calculate celestial distances.The new instruments replaced the Goddard High Resolution Spectrograph and the Faint Object Spectrograph.Īlso installed during Servicing Mission 2 were: In addition, they featured technology that wasn’t available when scientists designed and built the original Hubble instruments in the late 1970s - and opened up a broader viewing window for Hubble. The second instrument - the versatile Space Telescope Imaging Spectrograph (STIS) - would be used to take detailed pictures of celestial objects and hunt for black holes.īoth instruments had optics that corrected for the flawed primary mirror. The Near Infrared Camera and Multi-Object Spectrometer (NICMOS) would be able to observe the universe in the infrared wavelengths. To see these galaxies, Hubble needed to be fitted with an instrument that could observe infrared light.ĭuring a 10-day mission, seven astronauts aboard the space shuttle Discovery installed two technologically advanced instruments. However, the light from the most distant galaxies is shifted to infrared wavelengths by the expanding universe. Hubble’s first generation cameras gave us remarkable views of very distant galaxies. Lee, Mission Specialists Steven A.Hawley, Gregory J. Installation of two protective covers over original magnetometersĬrew: Commander Kenneth D.Installation of Goddard High Resolution Spectrograph Redundancy (GHRS) kit.Replacement of two Gyro Electronic Control Units, which direct the RSUs.Replace the #2 and #3 Rate Sensor Unit (two gyros each).Replacement of #1 Solar Array Drive Electronics (SADE). ![]() Solar Arrays replaced with Solar Arrays 2 (SA2).Wide Field Planetary Camera 2 (WFPC2) replaced Wide Field Planetary Camera (WFPC).COSTAR, Corrective Optics Space Telescope Axial Replacement installed, replacing High Speed Photometer (HSP).This successful mission not only improved Hubble's vision - which led to a string of remarkable discoveries in a very short time - but it also validated the effectiveness of on-orbit servicing.Īstronaut Jeffrey Hoffman removes Wide Field and Planetary Camera 1 (WFPC 1) during change-out operations. ![]() Spacewalkers also installed new gyroscopes to help point and track the telescope, along with fuse plugs and electronic units. Both WFPC2 and the COSTAR apparatus were designed to compensate for the primary mirror’s incorrect shape.Īlso installed during Servicing Mission 1 were new solar arrays to reduce the jitter caused by excessive flexing of the solar panels during the telescope’s orbital transition from cold darkness into warm daylight. They installed two new devices - the Wide Field and Planetary Camera 2 (WFPC2) and the Corrective Optics Space Telescope Axial Replacement (COSTAR). Once astronauts from the space shuttle Endeavour caught up with the orbiting telescope, they hauled it into the shuttle's cargo bay and spent five days tuning it up. Instead, it saw a fuzzy halo around objects it observed. Because Hubble’s primary mirror was incorrectly shaped, the telescope could not focus all the light from an object to a single sharp point. Hoffman and Tom AkersĪs the first in a series of planned visits to the orbiting Hubble Space Telescope, this mission’s most important objective was to install two devices to fix Hubble’s vision problem. Story Musgrave, and Mission Specialists Kathryn C.
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