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Heinrich Hertz Telescope (HHT)

The HHT is operated jointly by Max-Planck-Institut f;uuml&r Radioastronomie (MPIfR) and Steward Observatory on Mount Graham in Arizona, at an altitude of almost 3200 m.

It specialises in observations in the sub-millimetre waveband, where many emission lines of molecular gas can be observed. To protect its high-quality mirror surface, it is sheltered in a dome.