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• Space_Interferometry_Mission abstract "The Space Interferometry Mission, or SIM, also known as SIM Lite (formerly known as SIM PlanetQuest), was a planned space telescope developed by the U.S. National Aeronautics and Space Administration (NASA), in conjunction with contractor Northrop Grumman. One of the main goals of the mission was the hunt for Earth-sized planets orbiting in the habitable zones of nearby stars other than the Sun. SIM was postponed several times and finally cancelled in 2010.In addition to hunting for extrasolar planets, SIM would have helped astronomers construct a map of the Milky Way galaxy. Other important tasks would have included collecting data to help pinpoint stellar masses for specific types of stars, assisting in the determination of the spatial distribution of dark matter in the Milky Way and in the Local Group of galaxies and using the gravitational microlensing effect to measure the mass of stars.The spacecraft would have used optical interferometry to accomplish these and other scientific goals. This technique collects light with multiple mirrors (in SIM's case, two) which is combined to make an interference pattern which can be very precisely measured.The initial contracts for SIM Lite were awarded in 1998, totaling US$200 million. Work on the SIM project required scientists and engineers to move through eight specific new technology milestones, and by November 2006, all eight had been completed.SIM Lite was originally scheduled for a 2005 launch, aboard an Evolved Expendable Launch Vehicle (EELV). As a result of continued budget cuts, the launch date has been pushed back at least five times. NASA has set a preliminary launch date for 2015 and U.S. federal budget documents confirm that a launch date is expected "no earlier" than 2015. The budget cuts to SIM Lite are expected to continue through FY 2010. As of February 2007, many of the engineers working on the SIM program had moved on to other areas and projects, and NASA directed the project to allocate its resources toward engineering risk reduction. However, the preliminary budget for NASA for 2008 included zero dollars for SIM.In December 2007, the Congress restored funding for fiscal year 2008 as part of an omnibus appropriations bill which the President later signed. At the same time the Congress directed NASA to move the mission forward to the development phase. In 2009 the project continued its risk reduction work while waiting for the findings and recommendations of the Astronomy and Astrophysics Decadal Survey, Astro2010, performed by the National Academy of Sciences, which would determine the project's future.On 13 August 2010, the Astro2010 Decadal Report was released and did not recommend that NASA continue the development of the SIM Lite Astrometric Observatory. This prompted NASA Astronomy and Physics Director, Jon Morse, to issue a letter on 24 September 2010 to the SIM Lite project manager, informing him that NASA was discontinuing its sponsorship of the SIM Lite mission and directing the project to discontinue Phase B activities immediately or as soon as practical. Accordingly, all SIM Lite activities were closed down by the end of calendar year 2010.".
• Space_Interferometry_Mission thumbnail SIM-Lite_2008-concept.jpg?width=300.
• Space_Interferometry_Mission wikiPageExternalLink olbin.jpl.nasa.gov.
• Space_Interferometry_Mission wikiPageExternalLink newsletters.
• Space_Interferometry_Mission wikiPageExternalLink sim_index.html.
• Space_Interferometry_Mission wikiPageExternalLink sim.jpl.nasa.gov.
• Space_Interferometry_Mission wikiPageExternalLink solarsystem.nasa.gov.
• Space_Interferometry_Mission wikiPageExternalLink profile.cfm?MCode=SIM.
• Space_Interferometry_Mission wikiPageExternalLink 07-4071.pdf.
• Space_Interferometry_Mission wikiPageID "570274".
• Space_Interferometry_Mission wikiPageRevisionID "602597682".
• Space_Interferometry_Mission altNames "Space Interferometry Mission PlanetQuest".
• Space_Interferometry_Mission baseline "6 m".
• Space_Interferometry_Mission caption "Artist's concept of the SIM Lite Astrometric Observatory".
• Space_Interferometry_Mission diameter "30.0".
• Space_Interferometry_Mission hasPhotoCollection Space_Interferometry_Mission.
• Space_Interferometry_Mission instrument1Characteristics "360.0".
• Space_Interferometry_Mission instrument1Name "Science Interferometer".
• Space_Interferometry_Mission instrument2Name "Guide-1 Interferometer".
• Space_Interferometry_Mission instrument3Characteristics "252.0".
• Space_Interferometry_Mission instrument3Name "Guide Interferometer Guide-2 Telescope".
• Space_Interferometry_Mission launchDate "Cancelled in 2010".
• Space_Interferometry_Mission launchVehicle "Intermediate class launch vehicle similar to an Atlas V 521".
• Space_Interferometry_Mission majorContractors Northrop_Grumman.
• Space_Interferometry_Mission missionLength "3.15576E8".
• Space_Interferometry_Mission name "SIM Lite".
• Space_Interferometry_Mission orbitType "Earth-trailing heliocentric orbit".
• Space_Interferometry_Mission organization "NASA / JPL".
• Space_Interferometry_Mission style "Optical Michelson Interferometer".
• Space_Interferometry_Mission wavelength "0.4".
• Space_Interferometry_Mission website sim.jpl.nasa.gov.
• Space_Interferometry_Mission subject Category:Cancelled_spacecraft.
• Space_Interferometry_Mission subject Category:Exoplanet_search_projects.
• Space_Interferometry_Mission subject Category:Interferometric_telescopes.
• Space_Interferometry_Mission subject Category:Lockheed_Corporation.
• Space_Interferometry_Mission subject Category:NASA_programs.
• Space_Interferometry_Mission subject Category:Space_astrometry_missions.
• Space_Interferometry_Mission subject Category:Space_observatories.
• Space_Interferometry_Mission type Artifact100021939.
• Space_Interferometry_Mission type Device103183080.
• Space_Interferometry_Mission type Instrument103574816.
• Space_Interferometry_Mission type Instrumentality103575240.
• Space_Interferometry_Mission type InterferometricTelescopes.
• Space_Interferometry_Mission type Magnifier103709206.
• Space_Interferometry_Mission type Object100002684.
• Space_Interferometry_Mission type PhysicalEntity100001930.
• Space_Interferometry_Mission type ScientificInstrument104147495.
• Space_Interferometry_Mission type SpaceTelescopes.
• Space_Interferometry_Mission type Telescope104403638.
• Space_Interferometry_Mission type Whole100003553.
• Space_Interferometry_Mission comment "The Space Interferometry Mission, or SIM, also known as SIM Lite (formerly known as SIM PlanetQuest), was a planned space telescope developed by the U.S. National Aeronautics and Space Administration (NASA), in conjunction with contractor Northrop Grumman. One of the main goals of the mission was the hunt for Earth-sized planets orbiting in the habitable zones of nearby stars other than the Sun.".
• Space_Interferometry_Mission label "Space Interferometry Mission".
• Space_Interferometry_Mission label "Space Interferometry Mission".
• Space_Interferometry_Mission label "Space Interferometry Mission".
• Space_Interferometry_Mission label "Space Interferometry Mission".
• Space_Interferometry_Mission label "Space Interferometry Mission".
• Space_Interferometry_Mission label "Space Interferometry Mission".
• Space_Interferometry_Mission label "Space Interferometry Mission".
• Space_Interferometry_Mission label "太空干涉測量任務".
• Space_Interferometry_Mission sameAs Space_Interferometry_Mission.
• Space_Interferometry_Mission sameAs Space_Interferometry_Mission.
• Space_Interferometry_Mission sameAs Space_Interferometry_Mission.
• Space_Interferometry_Mission sameAs Space_Interferometry_Mission.
• Space_Interferometry_Mission sameAs Space_Interferometry_Mission.
• Space_Interferometry_Mission sameAs Space_Interferometry_Mission.
• Space_Interferometry_Mission sameAs m.02r3z6.
• Space_Interferometry_Mission sameAs Q224960.
• Space_Interferometry_Mission sameAs Q224960.
• Space_Interferometry_Mission sameAs Space_Interferometry_Mission.
• Space_Interferometry_Mission wasDerivedFrom Space_Interferometry_Mission?oldid=602597682.
• Space_Interferometry_Mission depiction SIM-Lite_2008-concept.jpg.
• Space_Interferometry_Mission homepage sim.jpl.nasa.gov.
• Space_Interferometry_Mission isPrimaryTopicOf Space_Interferometry_Mission.