The focus of this department is the solar interior, the solar atmosphere, the solar magnetic field, the heliosphere, and the interplanetary medium, as well as solar radiation and solar energetic particles. The balloon-mission Sunrise, a balloon-borne solar observatory, is managed by this department. The mission investigates our central star from a height of about 35 km. In addition to several other participations in space missions, the department significantly contributes to the ESA's Solar Orbiter.