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dc.contributor.authorMurphy, Tomen_US
dc.date.accessioned2013-11-18T20:48:33Z
dc.date.available2013-11-18T20:48:33Z
dc.date.issued2013-11-11
dc.identifier.urihttp://hdl.handle.net/1853/49430
dc.descriptionTom Murphy is a Professor of Physics at the University of California, San Diego. He is the project investigator for the Apache Point Observatory Lunar Laser-ranging Operation Project. Professor Murphy completed his Ph.D in Astrophysics at the California Institute of Technology after which he completed a postdoc at the University of Washington - Seattle before becoming a professor at the University of California, San Diego.en_US
dc.descriptionPresented on October 21, 2013 from 3:00 to 4:00 pm in Howey-Physics Building and Observatory, L3.en_US
dc.descriptionRuntime: 61:02 minutes.en_US
dc.description.abstractForty years ago, Apollo astronauts placed the first of several retroreflector arrays on the moon. Laser range measurements between the earth and the moon have provided some of our best tests to date of general relativity and gravitational phenomenology--including the equivalence principle, the time-rate-of-change of the gravitational constant, the inverse square law, and gravitomagnetism. A new effort called APOLLO (the Apache Point Observatory Lunar Laser-ranging Operation) is now collecting measurements at the unprecedented precision of one millimeter, which will produce order-of-magnitude improvements in a variety of gravitational tests, as well as reveal more detail about the interior structure of the moon. This talk will include an overview of the science, a description of the instrument and its performance, evidence for dust accumulation on the lunar surface, re-discovery of a lost Soviet reflector, and an outlook for advancing the state of gravity tests in the solar system.en_US
dc.format.extent61:02 minutes
dc.language.isoen_USen_US
dc.publisherGeorgia Institute of Technologyen_US
dc.subjectTesting gravityen_US
dc.subjectLunar laser rangingen_US
dc.titleTesting Gravity via Lunar Laser Rangingen_US
dc.typeLectureen_US
dc.typeVideoen_US
dc.contributor.corporatenameUniversity of California, San Diegoen_US
dc.contributor.corporatenameGeorgia Institute of Technology. School of Physicsen_US


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