Daniel Müller

Solar Physicist


Main Research Fields

I am the Project Scientist for the Solar Orbiter mission, a joint ESA-NASA space mission to study the Sun up close. Solar Orbiter is the first mission of ESA's Cosmic Vision 2015-2025 Programme. Scheduled for launch in October 2018, it will provide close-up, high-latitude observations of the Sun to study how the Sun creates and controls the Heliosphere, the huge plasma bubble in space that surrounds our solar system. I also serve as the Deputy Project Scientist for The Solar and Heliospheric Observatory (SOHO).

In addition, I have a strong interest in high-performance scientific data visualization. In particular, I am coordinating the development of the open-source  JHelioviewer software and am the ESA Project Lead of the ESA/NASA Helioviewer Project.


  • Helioinformatics (development of advanced techniques for data assimilation, visualisation, and browsing)
  • Solar spectropolarimetry (radiative transfer calculations and data analysis)
  • Models of coronal loops

Ongoing collaborations

  • Goddard Space Flight Center (Greenbelt, MD, USA)
  • Kiepenheuer Institute for Solar Physics (Freiburg, Germany)
  • Institute of Theoretical Astrophysics, University of Oslo (Norway)
  • High Altitude Observatory (Boulder, CO, USA)



Project/mission at ESA

Solar Orbiter, SOHO

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