University of Tasmania Greenhill Observatory is an operating optical astronomy and spacecraft-tracking site on Bisdee Tier near Spring Hill, Tasmania. The observatory operates the 1.3-metre Harlingten telescope and a 7.3-metre full-motion antenna for spacecraft communications, telemetry, tracking and payload-data download; the site also supports space-object and space-weather observation. The site includes facilities for researchers and visiting astronomers. Contact the University of Tasmania before travel for current visiting arrangements.