Testing Gravity via Lunar Laser Ranging

Murphy, Tom

Title:

Testing Gravity via Lunar Laser Ranging

dc.contributor.author	Murphy, Tom	en_US
dc.contributor.corporatename	University of California, San Diego	en_US
dc.contributor.corporatename	Georgia Institute of Technology. School of Physics	en_US
dc.date.accessioned	2013-11-18T20:48:33Z
dc.date.available	2013-11-18T20:48:33Z
dc.date.issued	2013-11-11
dc.description	Tom 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.description	Presented on October 21, 2013 from 3:00 to 4:00 pm in Howey-Physics Building and Observatory, L3.	en_US
dc.description	Runtime: 61:02 minutes.	en_US
dc.description.abstract	Forty 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.extent	61:02 minutes
dc.identifier.uri	http://hdl.handle.net/1853/49430
dc.language.iso	en_US	en_US
dc.publisher	Georgia Institute of Technology	en_US
dc.relation.ispartofseries	Physics Colloquium
dc.subject	Testing gravity	en_US
dc.subject	Lunar laser ranging	en_US
dc.title	Testing Gravity via Lunar Laser Ranging	en_US
dc.type	Moving Image
dc.type.genre	Lecture
dspace.entity.type	Publication
local.contributor.corporatename	College of Sciences
local.contributor.corporatename	School of Physics
local.relation.ispartofseries	Physics Colloquium
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