[2] Although two spacewalks were planned for the mission, they were both canceled after problems with the airlock hatch prevented astronauts Tom Jones and Tammy Jernigan from exiting the orbiter.It performed without problems for its flight, taking 422 observations of almost 150 astronomical bodies, ranging from the Moon to extra-galactic stars and a quasar.[1] Also deployed from Columbia was the Wake-Shield Facility (WSF), a satellite that created an ultra-vacuum behind it, allowing for the creation of semiconductor thin films for use in advanced electronics.Visualization in an Experimental Water Capillary Pumped Loop (VIEW-CPL) was conducted to test a new idea in thermal spacecraft management.[32] During landing, Jones planned to use a video camera to capture footage of the plasma tube trailing behind the orbiter from the overhead windows.He asked Musgrave to assist with the recording, with the expectation that he would take his seat on the mid-deck once the orbiter reached entry interface.Jones estimated that the 61-year-old Musgrave would have experienced 1.7 times the normal force of Earth's gravity for five to ten continuous minutes after 18 days of near weightlessness.