The 2dF Galaxy Redshift Survey, co-led by Matthew Colless, began the largest galaxy red shift survey of its time. It was based at the Anglo-Australian Observatory (AAO) using the 3.9m Anglo-Australian Telescope between 1997 and 11 April 2002. The survey measured more than 245,000 galaxies. With the Sloan Digital Sky Survey, this provided the measurements of large scale structure in the low-redshift Universe.