The MACHO project detected the first instance of the gravitational lensing of one star by another, known as gravitational microlensing, in 1993 (Alcock et al. 1993; Paczynski 1996). This discovery was made by repeated imaging of the Magellanic Clouds with the refurbished 50-inch Great Melbourne Telescope which was equipped with a mosaic of eight 2048 by 2048 pixel CCDs. The camera was constructed by the Centre for Particle Astrophysics in California (CFPA), and at the time was the largest digital camera ever built (Frame & Faulkner 2003). Observations began in July 1992 and the project concluded in December 1999. In total, the MACHO project made over 200 billion stellar measurements, with the