[collision] Welcome to LIGO Hanford Observatory, located in the Columbia Basin region of southeastern Washington. LIGO, the Laser Interferometer Gravitational-wave Observatory, seeks to detect gravitational waves -- ripples in the fabric of spacetime. First predicted by Einstein in his theory of general relativity, gravitational waves are produced by exotic events involving black holes, neutron stars and objects perhaps not yet discovered. Use our links to explore LIGO science, public outreach and educational resources.
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Up and Coming at LIGO Hanford Observatory . . .
[tours]Visit LIGO for a December 26 public tour    LIGO Hanford Observatory will close between December 24 and January 4, but the facility will open for a public tour on the afternoon of Friday, December 26. Come to LIGO at 3:00 PM on 12/26/14 and view the latest progress on the upgraded gravitational wave detector. Admission is free; no reservations are needed. Check the tours web page for full information and scan the driving directions before you come. Cell phone direction finders usually don't recognize the facility's address.

LIGO makes the S5 data set publicly available for analysis.   Say hello to the LIGO Open Science Center (LOSC)!  Through the LOSC Web site, the public can download data from LIGO's fifth science run (S5 -- the fall of 2005 through the fall of 2007). LOSC tutorials and tools will help users understand the data stream and perform analyses. The S5 release represents the first in an ongoing program of LIGO releases in future years. Check the LOSC Web site for full information about LIGO's new venture in public data.
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[121411] What do you want to know about LIGO? LIGO Hanford's list of Frequently Asked Questions (FAQ) now resides on our Web site. Surf our FAQ for responses to often-asked questions that cover various aspects of LIGO detector operations, data analysis, astronomy/astrophysics and working life at the Observatory. LIGO Hanford thanks students from Liberty High School and Sammamish High School for sending in the questions that started the LHO FAQ!
View recent Advanced LIGO progress at LIGO Hanford by sampling our updated video collection. LHO now has completed the first two tests of Advanced LIGO seismic and suspension subsystems and optical controls, exercising Advanced LIGO hardware between the main laser and one of the detector end stations. The next test, resonating the laser light in the central portion of the detector, is now underway. Commissioning of the full advanced H1 and L1 interferometers will begin in 2014 as the LIGO team moves toward a late 2014 return to detector operations. View the videos[LHO HAM 2]
Explore LIGO . . .
[LIGO movie]Watch a new movie:
LIGO, a Passion for Understanding


Stream this 22-minute film from Space.com to see Advanced LIGO coming to life and to hear the thoughts and reflections of a number of LIGO personnel as they continue the journey toward gravitational wave detections on LIGO's huge interferometers.
LIGO Tour
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• Last modified Dec 19, 2014
• "Colliding Black Holes" courtesy of Werner Benger, Zuse Institute Berlin, Max-Planck Institutue fuer Gravitational Physics (Albert Einstein Institute) and the Center for Computation & Technology at Louisiana State University.
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LIGO is supported by the National Science Foundation. Any opinions, findings, conclusions or recommendations expressed here are those of the author(s) and do not necessarily reflect the views of the National Science Foundation