Mount Stromlo Observatory (MSO) located just outside of Canberra, Australia, is part of the Research School of Astronomy and Astrophysics at the Australian National University (ANU).
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 8 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 data processed both at the observatory and at the Lawrence Livermore National Laboratory.
The instrumentation group at Mount Stromlo Observatory has built two instruments for the Gemini Telescope. This includes the near infrared integral field spectrometer, NIFS, deployed on Gemini-North, and the adaptive optics imager for Gemini-South, GSAOI. NIFS, when nearly completed, was destroyed in the bushfires of 18 January 2003, and rebuilt.
A new rapid survey telescope, SkyMapper, is under construction.SkyMapper will reside at the ANU's other observatory (Siding Spring) and operated remotely from Mount Stromlo.
Mount Stromlo Observatory is located at an altitude of 770 metres above sea level on Mount Stromlo. Situated west of the centre of Canberra, near the district of Weston Creek. Canberra's main water supply treatment plant is located nearby.