Narrabri Stellar Intensity Interferometer, Astronomical interferometer at Narrabri Observatory, New South Wales, Australia.
The Narrabri Stellar Intensity Interferometer features a circular track with two light detectors positioned between 10 and 188 meters apart for stellar measurements.
Established in 1963 by the University of Sydney School of Physics, the interferometer operated until 1974, measuring the diameters of 32 different stars.
The facility represents a milestone in astronomical research through its collaboration between Australian and British scientific institutions during the 1960s.
Located at coordinates 30°12′33″S and 149°45′04″E, the interferometer specialized in measuring angular diameters of bright stars within spectral range 0 to F.
The instrument was the first of its kind to successfully measure star diameters using visible wavelengths through intensity interferometry techniques.
Location: New South Wales
GPS coordinates: -30.20920,149.75100
Latest update: April 4, 2025 20:22
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