Reto Trappitsch

Reto Trappitsch



Early on in life I was already fascinated by the stars. First with a small 6” Newton type reflector, then with an 11” Cassegrain type telescope I observed planets, galaxies, an other objects, which fostered my fascination for Astronomy. After high school, I went to the University of Bern in Switzerland and received first my BSc in Physics and Astronomy in 2008 and then my MSc in Physics in 2010. I then moved to the University of Chicago, from where I received my PhD in 2016 for the thesis entitled: “Deciphering Galactic Chemical Evolution: Iron and Nickel Isotopes and Cosmic Ray Exposure Ages of Presolar Silicon Carbide Grains”. During my PhD I helped build the CHILI Resonance Ionization Instrumet at the University of Chicago.

After my time in Chicago, I moved to Lawrence Livermore National Laboratory as a postdoc and worked on the LION Resonance Ionization Instrument. In December 2019 I became a staff scientist at the lab. Between October 2020 and June 2022 I was Assistant Research Professort in the Physics Department at Brandeis University. In August 2022, I joined EPFL as a Scientist in the LGB. Here, I am still working on astrophysics and cosmochemistry.


  • Stardust
  • Nucleosynthesis
  • Galactic Chemical Evolution
  • Cosmogenic Nuclides
  • Cycling


  • PhD in Geophysical Sciences, 2016

    University of Chicago

  • MSc in Physics, 2010

    University of Bern

  • BSc in Physics with Astronomy, 2008

    University of Bern