Past Presentations and Trips

• “CLUES Collaboration Meeting”, Potsdam, Germany (June 16-20, 2025).
• “Science & Fiction – a SciFi-inspired day about innovation and transfer in Germany”, Berlin, Germany; organized by RWTH Aachen’s Next Generation University initative (June 26, 2025).
• Workshop “A new dawn of dwarf galaxy research“, Lorentz Center@Oort, Leiden, The Netherlands (April 8 – 12, 2024).
• Next Generation University: Knowledge Sharing Event on “Transformation – Transfer – Impact”, Berlin; organized by RWTH Aachen (May 6, 2024).
• Physics Colloquium, University of Bochum (May 13, 2024).
• Astronomy Colloquium, University of Heidelberg (May 16, 2024).
• „Next Generation University“ Initative Meeting, Berlin; organised by RWTH Aachen (November 7, 2023).
• Presentation at “bundesweite Lehrerfortbildung der Wilhelm und Else Heraeus-Stiftung” (teacher training conference),  Haus der Astronomie (HdA) Heidelberg (November 10, 2023).
• Invited seminar talk, Max Planck Institute for Gravitational Physics “Albert Einstein Institute” (November 22, 2023).
• Presentation at advanced training events for physics teachers by the University of Bayreuth, Germany (October 4, 2023).
• Lunch Seminar talk, Astronomy group at the University of St. Andrews, UK (October 10, 2023).
• Invited talk,  “20th Serbian Astronomical Conference“, Belgrade, Serbia (October 16-20, 2023).
• Invited talk in MOND community telecon, (July 26, 2023).
• Presentation at “MOND at 40” conference, St. Andrews, UK (June 5-9, 2023).
• EAS 2023, European Astronomical Society Meeting, Krakow, Poland (July 9-14, 2023); 2 talks (S10 & SS34), 1 poster (SS19).
• (Co-)Chair of SOC and LOC, IAU Symposium 379 “Dynamical Masses of Local Group Galaxies”, Potsdam, Germany (March 20-24, 2023)
• Leibniz Leadership Academy, Berlin (June 20-22, 2022).
• EAS 2022, European Astronomical Society Annual Meeting, Valencia, Spain; 2 talks (S3 & S4), 1 PSP (S2), 1 SOC: (SS8). (June 27 – July 1).
• Leibniz Leadership Academy, Berlin (August 29-31, 2022).
• Falling Walls Science Summit 2021, Wilhelm and Else Heraeus Symposium for Breakthroughs in Sciences, Berlin (November 8, 2021).
• Physics Colloquium, “Systems of Satellite Galaxies: Are their Distributions and Motions Consistent with Galaxies?”, University of Groningen, virtual (November 11, 2021).
• ESO Informal Discussion on Dark Matter, “The bigger picture of dwarf galaxy alignments in the Local Group and beyond”, ESO, virtual (December 1, 2021)
• Organizing splinter session “Healthy Careers in Astronomy (and beyond)” for Annual Meeting of the German Astronomical Society with Francesca Fragkoudi, Sept. 16, 2021  (virtual).
• Organizing Lunch Section LS3 “Healthy Careers in Astronomy” at the virtual EAS Annual Meeting 2021 with Victoria Grinberg, June 28 – July 2, 2021.
• Virtual public talk, Babelsberger Sternennächte, May 20, 2021.
• Contributed talk at Tehran Meeting on Cosmology at the Crossroads 2021 (TMCC2021), virtual, Feb. 22-25, 2021.
• Public Talk (virtual), Orange County Astronomers, January 8, 2021. [RECORDING, talk starts after minute 51]
• Astronomy Colloquium, University of Nottingham, UK (virtual), October 21, 2020.
• Talk at STScI Spring Symposium “The Local Group: Assembly and Evolution“, April 20-23 postponed to August 31 – September 4 (postponed and changed to virtual meeting), 2020, Baltimore, USA. Link to public Webcast (my talk starts at minute 29)
• Organizing splinter session “Healthy Careers in Astronomy” for Annual Meeting of the German Astronomical Society with Victoria Grinberg, Sept. 23, 2020  (virtual).
• Two science talks at European Astronomical Society Annual Meeting, plus running my own Symposium 11: The Local Group in Context, June 29 – July 3, 2020, Leiden, The Netherlands. Changed to virtual meeting
• Colloquium, February 25, 2020; Oscar Klein Centre, Albanova, Stockholm, Sweden.
• Babelsberger Sternennächte (popular science talk in German), January 16, 2020, Leibniz-Institute for Astrophysics, Potsdam, Germany.
• Popular science talk (in German), November 22, 2019, Bruno H. Bürgel Sternenwarte, Berlin, Germany.
• The functioning of galaxies: challenges for Newtonian and Milgromian dynamics, September 23-27, 2019, University of Bonn, Germany.
• A synoptic view of the Magellanic Clouds: VMC, Gaia and beyond, September 9–13, 2019, ESO Garching, Germany.
• Cosmology Seminar, 11:00am, September 10, 2019, Max-Planck Institute for Astrophysics, Garching, Germany.
• CLUES 2019 Meeting, September 2-6, 2019, Lyon, France.
• Small Galaxies, Cosmic Questions, July 29 – August 2, 2019, Durham, United Kingdom.
• Cosmology Section Retreat, May 27, DESY Zeuthen, Germany.
• Stipendiatentreffen der Klaus Tschira Stiftung, March 8, 2019, Heidelberg, Germany.
• Dark Matter & Modified Gravity – Interdisciplinary Perspectives on the Underdetermination between Dark Matter and Modified Gravity, Aachen, Germany (February 6–8, 2019).
• Colloquium, Leibniz-Institute for Astrophysics Potsdam (AIP), Germany (January 31, 2019).

• Colloquium, University of Victoria, Canada (October 31, 2018).
• Colloquium, NRC Herzberg, Victoria, Canada (October 30, 2018).
• Colloquium, University of British Columbia, Vancouver, Canada (October 29, 2018).
• Cosmology on Small Scales 2018, Prague, Czech Republic (September 26-19, 2018).
• Visit to Leibniz-Institute for Astrophysics Potsdam (September 10-21, 2018).
• Colloquium, University of Bonn, Germany (September 6, 2018).
• IAU General Assembly 2018, Vienna, Austria (August 20-31, 2018). Talk in IAU Symposium 348 on Tuesday, August 28, E-Poster in IAU Symposium 344. [see this site for more information on my contributions]
• UCSC Galaxy Formation Workshop, Santa Cruz, USA (August 6-10, 2018). [video of talk]
• Astrophysics Lunch Seminar, JPL, Pasadena (May 7, 2018).
• KITP program “The Small-Scale Structure of Cold(?) Dark Matter“, Santa Barbara. Invited speaker (April 16-20, 2018). [video of talk]
• Public Talk, Monterey Institute for Research in Astronomy, Monterey, CA (April 14, 2018).
• Shedding Light on the Dark Universe with Extremely Large Telescopes, UCLA, Los Angeles (April 2-6, 2018).
• Lunch Talk, Carnegie Observatories, Pasadena (March 30).
• Hubble Fellows Symposium, STScI, Baltimore (March 19-21, 2018).
• Science with Precision Astrometry Workshop, STScI, Baltimore (March 13-15, 2018). [link to webcast]
• UCLA Dark Matter 2018 workshop, Los Angeles, CA; invited talk (Feb. 21-23, 2018).
• 2017 Annual UCI Postdoctoral Scholar Research Symposium. TED-style talk: “Dark Matter and the Dance of Dwarf Galaxies” (October 5, 2017).

• Challenges in Galaxy Evolution, fast talk, Florence, Italy (August 28 – September 1, 2017).
• 2017 Santa Cruz Galaxy Workshop, UC Santa Cruz, CA, USA (August 7-11, 2017) [video of talk]
• French Week of Astronomy (Semaine de l’Astrophysique Française), talks in S04 & S06, Paris, France (July 4-7, 2017).
• Large Surveys of the Great Andromeda Galaxy, Lorentz Center, Leiden, The Netherlands (July 10 – 14, 2017).
• Dwarf Galaxies on Shoulders of Giants, Cleveland, OH, USA (June 4-8) [organized by Stacy McGaugh, Federico Lelli, Benoit Famaey, and me]
• Hubble Fellows Symposium, STScI, Baltimore (March 13-15).
• German Scholars Organization e.V. “Leadership Academy”, Part 2, Darmstadt, Germany (February 1 – 6, 2017).
• Visit to ARI & presentation at MPIA Milky Way group meeting, Heidelberg, Germany (January 31 – February 1, 2017).
• Observatoire de Strasbourg (visit, galaxy lunch talk), France (November 23 – 25, 2016).
• Observatoire de Paris (colloquium), France (November 21 – 22, 2016).
• Charles University in Prague (seminar talk), Czech Republic (November 15 – 18, 2016).
• University of Bonn and Max Planck Institute for Radio Astronomy (colloquium), Bonn, Germany (November 8 – 15, 2016).
• Conference & Workshop “Dark Matter Distribution in the Era of Gaia“, (1 invited + 1 contributed talk) Nordita, Stockholm, Sweden (October 24 – November 4, 2016).
• German Scholars Organization e.V. “Leadership Academy”, Part 1, Boston, MA (October 11-16, 2016).
• Carnegie Mellon University & University of Pittsburgh (seminar talk), Pennsylvania, USA (September 15 – 17, 2016).
• Conference (talk), “Great Lakes Cosmology and Galaxies 2016”, McMaster University, Hamilton, Ontario, Canada (June 19 – 22, 2016).
• ESO Garching, Germany (April 4-5, 2016, Lunch Colloquium on April 5).
• Conference (talk), 13th Potsdam Thinkshop “Near-Field Cosmology”, Obergurgl University Centre, Tyrol, Austria (March 29 – April 3, 2016).
• PoR workshop (talk), Observatoire de Strasbourg, France (September 21-25).
• Seminar talk, University of Michigan, Ann Arbor, USA (October 29-30, 2015).
• Seminar talk, Columbia University, New York City, USA, (October 8, 2015).
• Colloquium talk, AMNH, New York City, USA, (October 6, 2015).
• Visitor Colloquium, Leibniz-Institut für Astrophysik Potsdam, Germany (August 13, 2015).
• “Local Group Astrostatistics“, conference, University of Michigan, Ann Arbor, MI, USA (June 1-4, 2015).
• Invited talk (astronomy lunch talk series), Rochester Institute of Technology, Rochester, NY, USA (April 29, 2015).
• “Satellites and Streams in Santiago“, conference, ESO Santiago, Chile. Talk (April 13-17, 2015).
• “Neighborhood Workshop on Astrophysics and Cosmology“, workshop, PennState, State College, PA, USA. Talk (March 26-27, 2015).
• Invited talk (astronomy seminar), UPenn, Philadelphia, PA, USA (February 11-12, 2015).
• “Beyond LCDM” conference, Oslo, Norway. Talk, poster and co-chair of the discussion session “Small-scale structure: Which problems are real? Which solutions are viable?” with Matteo Viel and Till Sawala (January 13-17, 2015).
• CERCA workshop “Large Angle Anomalies from a posteriori to a priori”, CWRU, Cleveland, OH. Informal presentation on small-scale/near-field-cosmology anomalies (September 11-13, 2014)
• “11th Potsdam Thinkshop: Satellite galaxies and dwarfs in the local group“, Potsdam, Germany. Invited talk, title: “Dwarf Galaxy Structures in the Local Group” (August 25-29, 2014)
• “MODEST 14  The dance of stars: dense stellar systems from infant to old“, Bad Honnef, Germany. Talk title: “Globular Clusters in relation to the VPOS of the Milky Way” (June 2-6, 2014)
• “AAS Topical Conference: Probes of Dark Matter on Galaxy Scales“, Monterey, CA, USA. Talk title: “The satellite galaxy planes of the MW and M31 in the context of the Local Group” (July 14-19, 2013)
• Conference “Small Stellar Systems in Tuscany: From Globular Clusters to Dwarf Galaxies and Everything in Between“, Prato, Italy. Talk title: “On the origin of correlated populations of dwarf galaxies in the Local Group” (June 10-14, 2013)
• Max-Planck-Institut für Astronomie, Heidelberg: visitor colloquium “Correlated Structures of Satellite Galaxies in the Local Group and Their Origin” (February 18, 2013)
• GEPI at the Observatoire de Paris: collaboration meeting and invited seminar talk, “Satellite galaxy planes in the Local Group and clues on their origin” (January 28, 2013).
• Observatoire astronomique de Strasbourg, France: Invited colloquium talk “The VPOS: a vast polar structure of satellites around the Milky Way” (January 11, 2013)
• Max-Planck-Institute for Radio Astronomy: Lunch Colloquium Talk “Correlated structures of dwarf galaxies in the Local Group” (January 9, 2013)
• 13th Marcel Grossmann Meeting, Stockholm, Sweden. Talk in the parallel session “Self-Gravitating System” (July 3, 2012).
• GEPI at the Observatoire de Paris: invited by the group of Prof. Francois Hammer to give a seminar talk “A vast polar structure of satellite galaxies, globular clusters and streams around the Milky Way” (March 12, 2012).
• Max-Planck-Institute for Radio Astronomy: Lunch Colloquium Talk “A Giant polar structure of streams, globular clusters and satellite galaxies around the Milky Way” (December 7, 2011).
• Bonn-Cologne Graduate School of Physics and Astronomy Retreat/Seminar: giving a talk in the session “The amazing world of galaxies”. (2011)
• Conference/annual meeting of the German Astronomical Society: “Surveys & Simulations – The Real and the Virtual Universe” in Heidelberg: giving two talks, one each in the splinter meetings “From Star Clusters to Galaxy Formation – The Virtual Universe” and “Does the redshift-zero universe look as predicted by models?“. Also presenting a poster. (2011)
• Conference “Assembling the Puzzle of the Milky Way” in Le Grand Bornand, France. Presentation of a poster. (2011)
• Conference “Dynamics of Low-Mass Stellar Systems: From Star Clusters to Dwarf Galaxies” at ESO in Santiago de Chile, giving a talk. (2011)
• Trip to the University of Vienna for a collaboration meeting with Prof. G. Hensler and S. Ploeckinger, also giving a talk. (2010)
• Conference “New Directions in Modern Cosmology” in the Lorentz Center in Leiden, presentation of a poster (2010)
• Annual meeting of the German Astronomical Society: “Zooming in: The Cosmos at High Resolution“, talk in the splinter meeting “Magellanic Clouds“. (2010)
• Summer school “Evolution of galaxies and their large-scale environment“. (2010)
• Trip to the Australian National University in Canberra, talk and collaboration with Dr. H. Jerjen in the Milky Way satellite galaxies. (2009)
• Conference „Tidal Dwarf Galaxies Bonn“, poster presentation and LOC. (2009)
• School “MODEST8a – School on Dynamics of Dense Stellar Systems and Gravitational Wave Generation”. (2008)
• Conference “The Milky Way Halo – Stars and Gas” at the AIfA Bonn, LOC. (2007)