Some Like it Hot
to solve at least some of these secrets. Also on board: A tip/tilt unit from PI for the secondary mirror of one of the central experiments, the Polarimetric and Helioseismic Imager (PHI). The Solar Orbiter [...] and even first >> TV broadcasts testify to the great interest. The tip/tilt unit of the secondary mirror of the PHI telescope weighs only 255 grams, has a diameter of 45 mm, and is 44 mm high Of particular [...] researchers of the Leibniz Institute, is based on a tip/tilt unit from PI that moves the secondary mirror of the telescope; it weighs 71 grams and is made of Zerodur. All technical subsystems, including