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  • Gravity Probe B: Testing Einstein's Universe
    awarded the Austrian Cross of Honor for Science Art Story on Mission News page Quick Links FAQ Revised Sep 2008 Press Information NASA Post Flight Report Mar 2007 NASA Science Report Dec 2008 Slides from Presentations Technical Papers Image Gallery and Media Gallery KACST Stanford Documents Collaborators GP B Mission GP B was designed to measure two key predictions of Einstein s general theory of relativity by monitoring the orientations

    Original URL path: http://einstein.stanford.edu/ (2012-11-10)
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  • Gravity Probe B - MISSION STATUS
    Headquarters On 4 May 2011 NASA Headquarters in Washington DC hosted a 50 minute GP B Science Update for the purpose of announcing the final experimental results to the press media and the public This event which was televised live on NASA TV and streamed live from the NASA TV website featured NASA Science Mission Directorate Public Affairs Officer Trent Perrotto as moderator GP B Principal Investigator Francis Everitt who announced the final results and four other panelists who discussed various aspects of the program its many accomplishments and the significance of the results to physicists and the scientific community at large In order of their presentations the panelists included Bill Danchi Senior Astrophysicist and GP B Program Scientist at NASA Headquarters Dr Danchi provided a general overview of the GP B experiment and mission Francis Everitt Principal Investigator of GP B and Research Professor in the WW Hansen Experimental Physics Lab HEPL at Stanford University In addition to announcing the experimental results Professor Everitt described the two general relativity effects that were measured provided many details and anecdotes about the experiment the flight mission the complications discovered in the data and the detective story of identifying the sources of these complications and ultimately removing these complications to achieve credible results Rex Geveden President of Teledyne Brown Engineering and former NASA Marshall Space Flight Center Program Manager for GP B Mr Geveden spoke about the innovations development and spin offs of the many new technologies that were developed for use in the GP B experiment and spacecraft Colleen Hartman Senior NASA Advisor and Research Professor at George Washington University Professor Hartman who had been the the NASA Heaqdquarters Program Executive for GP B during a critical four year period leading up to the flight development phase of the mission spoke about the history and management of GP B Professor Hartman closed her remarks with a quote from Albert Einstein about tenacity and persistence that typifices the GP B program Clifford Will James S McDonnell Professor of Physics and Chairman of the GP B Science Advisory Committee Professor Will discussed the role of the the NASA sponsored external GP B Science Advisory Committee which he chaired for the past 13 years the data analysis issues and their resolution by the GP B team and the significance of the GP B experiment both in terms of scientific inquiry in general and specifically the relevance of the frame dragging result to some of the most energetic and cataclysmic events in the universe The presentations lasted about 35 minutes and were followed by 15 minutes of questions and answers both from reporters journalists and other members of the audience at NASA Headquarters and also from reporters and journalists linked in from other NASA facilities around the country Gravity Probe B Video Files GP B in a Nutshell The Video 14 min YouTube Video Nutshell overview of the program experiment technology and results GP B Video File Part 1 10 min YouTube Video Technology development

    Original URL path: http://einstein.stanford.edu/highlights/status1.html (2012-11-10)
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  • GP-B — Mission
    to Mission Overview History Management Who came up with the idea of using gyros in space to test Einstein s theory How and where was the GP B technology developed How was such a complex program managed Why did it take over 40 years to carry out this conceptually simple experiment Go to History Management Launch and Checkout What was involved in preparing for launch When did the spacecraft launch and how did it go What had to be accomplished during the Initialization and Orbit Checkout IOC phase Why did this phase last twice as long as originally anticipated Go to Launch Checkout Mission Operations How well prepared was the GP B Mission Operations team What was a typical day like in the Mission Operations Center MOC Were there any problems with the spacecraft in orbit and if so how were they handled Why were instrument calibrations performed When did the mission end Go to Mission Operations Data Processing Analysis How was GP B data collected and transferred from the spacecraft to the Mission Operations Center at Stanford How often did the team communicate with the spacecraft How were data errors and computer problems handled What is the general process

    Original URL path: http://einstein.stanford.edu/MISSION/mission-index.html (2012-11-10)
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  • GP-B — Technology
    comprise the GP B payload and spacecraft How are the payload and spacecraft integrated What is a drag free satellite and why is this important for GP B What kinds of redundancy was built into the GP B payload and spacecraft systems Go to Payload Spacecraft Unique Challenges Solutions What were some of the unique technological challenges that GP B had to address in order to carry out this unprecedented test of Einstein s theory of gravity How were these challenges solved and what were the results Learn some bonus facts about GP B technologies Go to Unique Challenges Solutions Technology Stories Why are the solar panels on the spacecraft arranged at such odd angles Why are there four windows in the probe what is special about them What is unique about the GP B science telescope Read vignettes about various GP B technologies Go to Technology Stories Technology Papers Reports Delve into the details of GP B technologies This archive contains many technical papers and reports divided into two main categories Scientific Technical docments and Procedural documents Each main category is further divided into sub categories Go to Papers Reports Technology Spinoffs What does Einstein s theory have to

    Original URL path: http://einstein.stanford.edu/TECH/technology-index.html (2012-11-10)
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  • GP-B — Spacetime
    exist absolutely in general relativity Is it more relative than in special relativity Go to Einstein s Spacetime Testing Einstein Why is it more important to test Einstein s theory of general relativity now than ever before What aspects of the theory have been tested so far and to what accuracy What remains to be done Go to Testing Einstein Spacetime Spin How does spacetime affect spinning bodies and vice

    Original URL path: http://einstein.stanford.edu/SPACETIME/spacetime-index.html (2012-11-10)
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  • Gravity Probe B - RESOURCES
    Education page contains an overview of Education Public Outreach activities plus downloadable PDF copies of our 52 page Educator s Guide grades 9 12 our Spacetime Triptych 3 panel Poster 8x10 lithograph card set educator s PowerPoint presentation and a scaled paper model of the GP B spacecraft Go to Education Image Galleries The Image Galleries display sets of photos drawings and artwork that cover all aspects of the GP B experiment from development through launch and mission operations All of the images are captioned and a full resolution version of any selected image may be downloaded for printing Go to Image Galleries Media Gallery The Media Gallery contains movies video clips animations simulations and audio files The video and animation files are encoded in Adobe Flash Video flv format for Web display Downloadable MPEG4 versions of some video files are also available The downloadable audio files are MP3 fomat Go to Media Gallery Papers The Papers page contains PDF files of more than 100 scientific papers that have been published about various aspects of GP B over the past 45 years This collection is divided into a number of subject categories to facilitate browsing You can also use the

    Original URL path: http://einstein.stanford.edu/RESOURCES/Resources-index.html (2012-11-10)
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  • GB-B 14-Minute VIdeo Overview
    spacetime resources Program Info Press Education Image Gallery Media Gallery Papers Presentations KACST Gravity Probe B In A Nutshell Video Overview of the Experiment Science Technologies and Results YouTube Video Duration 14 Minutes Playable on both Flash Enabled Computers and

    Original URL path: http://einstein.stanford.edu/Media/GP-B_Nutshell_Video.html (2012-11-10)
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  • Animation: A "Simple" Experiment
    spacetime resources Program Info Press Education Image Gallery Media Gallery Papers Presentations KACST Animation A Simple Experiment Flash Video Duration 1 Minute 8 Seconds Designed by Bob Kahn James Overduin Stanford GP B Animators Lee Kolb Greg Trent NASA MSFC

    Original URL path: http://einstein.stanford.edu/Media/Simple_Expt_Anima-Flash.html (2012-11-10)
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