A selection of talks

• New era of interferometry – where we are and where to go, IPAG Planétologie Astrophysique Grenoble, Grenoble, France, January 2026
• Continued revolution in high angular resolution astronomy, GRAVITY+ Consortium Meeting, European Southern Observatory, Garching, Germany, February 2025
• State of the Union, MPE IR/Submm group retreat, Ringberg, Germany, December 2025
• The Black Hole in the Center of the Milky Way, Black Hole Days, Origins Universe Cluster, Garching, Germany, October 2025
• IR/Submm Astronomy, Presentation to the Scientific Advisory Board, Max Planck Institute for extraterrestrial Physics, Germany, October 2025
• Kilometers Baseline Interferometry, The Restless Universe, Annual Meeting of the German Astronomical Society, Görlitz, Germany, September 2025
• Stellar Dynamics Near the Galactic Center Black Hole, Maximizing Science Impact of the European Extremely Large Telescope, Ringberg, Germany, June 2025
• Astrophysics at Highest Resolution - Breaking Limits with Adaptive Optics and Interferometry, Conferral of the TUM distinguished affiliated professorsip, Technical University of Munich, Garching, Germany, June 2025
• GRAVITY+ Highlights and Outlook, GRAVITY+ Consortium Meeting, European Southern Observatory, Garching, Germany, February 2025
• Kilometers Baseline Interferometer, Horizons for Optical Long Baseline Interferometry, Meudon, France, January 2025
• Thoughts on Future Optical/IR Interferometry, Remote Presentation, California Institute of Technology, Pasadena, California, December 2024
• Astronomy at Highest Angular Resolution – GRAVITY Revolution in Optical/IR Interferometry, Universität zu Köln, Germany, December 2024
• Infrared Observations of the Galactic Center Black Hole, Transient Phenomena and Physical Processes Around Supermassive Black Holes, Shanghai, China, October 2024
• Astronomy at Highest Angular Resolution – Next Generation Interferometry with GRAVITY, Kavli Institute for Astronomy and Astrophysics, Peking, China, October 2024
• Immer größer, immer schärfer - Teleskope, unser Fenster zum Universum, Tag der Offenen Tür, Garching, Germany, October 2024
• Update on GRAVITY+ – A glimpse on the future of ground based astronomy beyond the ELT, ESO Paranal Observatory, Chile, August 2024
• A New Era of Interferometry with GRAVITY(+), European Astronomical Society Annual Meeting, Padova, Italy, July 2024
• From GRAVITY(+) Towards a Kilometers Baseline, Large Telescope Interferometer, SF2A Meeting, Marseille, France, June 2024
• Towards a Whitepaper on Expanding the VLTI, From GRAVITY(+) Towards a Kilometers Baseline, Large Telescope Interferometer, Ringberg, Germany, June 2024
• BDie Experimente hinter der Entdeckung des Schwarzen Lochs im Zentrum der Milchstraße, Volkssternwarte, München, Germany, May 2024
• Instrumentation Summary and Discussion, RDS Strategy Meeting for Denkschrift 2025, Potsdam, Germany, April 2024
• Beyond E/VLT(I) - Towards a Kilometers Baseline, Large Telescope Interferometer, RAS Meeting, London, England, March 2024
• Astronomy at Highest Angular Resolution Adaptive Optics, Interferometry and Black Holes, Instituto Superior Técnico, Lisbon, Portugal, March 2024
• The Black Hole in the Centre of the Milky Way, Instituto Superior Técnico, Lisbon, Portugal, February 2024
• Beyond GRAVITY, Fundamental Physics at the Galactic Center, Porto, Portugal, December 2023
• Astronomy at Highest Angular Resolution Adaptive Optics, Interferometry and Black Holes, University of Oxford, Astrophysics Colloquium, UK, November 2023
• Astronomy at Highest Angular Resolution Adaptive Optics, Interferometry and Black Holes, Max Planck Institute for Radio Astronomy, Bonn, Germany, October 2023
• Astronomy at Highest Angular Resolution Adaptive Optics, Interferometry and Black Holes, Annual Meeting of the German Astronomical Society, Berlin, Germany, September 2023
• Next Generation Interferometry with GRAVITY+, Observatoire de Paris – Meudon, France, July 2023
• GRAVITY and The Galactic Center Black Hole, The 11th VLTI Interferometry School, Budapest, Hungary, June 2023
• Astronomy at Highest Angular Resolution Adaptive Optics, Interferometry and Black Holes, Physics Colloquium, Tel Aviv University, Israel, May 2023
• GRAVITY(+) – Optical / IR Interferometry and Black Holes, IRAM, Grenoble, France, April 2023
• Astronomy at Highest Angular Resolution Adaptive Optics, Interferometry and Black Holes, University of Concepción, Concepcion, Chile, March 2023
• Lessons learned – from GRAVITY, and SINFONI, ERIS, G+, European Southern Observatory, Garching, Germany, March 2023
• GRAVITY, SINFONI, and the Black Hole in the Center of the Milky Way, ESO Paranal Obervatory, Chile, January 2023
• GRAVITY, SINFONI, and the Black Hole in the Center of the Milky Way, European Southern Observatory, Santiago, Chile, January 2023
• Immer größer, immer schärfer – Teleskope, unser Fenster zum Universum, Deutsche Museum, Munich, Germany, January 2023
• The Galactic Center black hole, the effects of General Relativity, and how to observe them, Séminaire général de physique de l’Institut Polytechnique de Paris, Palaiseau, France, December 2022
• 5 Years of GRAVITY – A Revolution in High Angular Resolution Astronomy, Observing the Universe in Motion, Ringberg, Germany, October 2022
• GRAVITY Results on SgrA*, EHT - Gravity meeting on SgrA*, Nijmegen, The Netherlands, September 2022
• A New Era of High Angular Resolution Astronomy, Gruber Cosmology Prize Lecture, IAU XXXIst General Assembly, Busan, Republic of Korea, August 2022
• Infrared Interferometry of the Galactic Center Black Hole, 23rd International Conference on General Relativity and Gravitation, Bejing, China, July 2022
• A New Era of Interferometry with GRAVITY+, Why Large Telescopes are Good for Interferometry, Genzel @ 70 Conference, Ringberg, Germany, June 2022
• The Richness and Power of Near Infrared Interferometry, Assembling the ngEHT: Community-DrivenScience to a Global Instrument, Granada, Spain, June 2022
• A New Era of Interferometry with GRAVITY(+), Colloquium, Osservatorio Astrofisico di Arcetri, Italy, May 2022
• Exploring the Supermassive Black Hole at the Centre of the Milky Way, public lecture at The Sharpest Eyes on the Sky conference, Exeter, England, April 2022
• Astronomy at Highest Angular Resolution Adaptive Optics, Interferometry and Black Holes, Stern-Gerlach Medal Prize Talk, DPG Frühjahrstagung, Heidelberg, Germany, March 2022
• A New Era of Interferometry with GRAVITY(+), Astralis Colloquium, Australia, February 2022
• Follow Tycho Brahe: Precision Astronomy with Interferometry, Danish Institute for Advanced Study, University of Southern Denmark, Odense, Denmark, November 2021
• A New Era of Interferometry with GRAVITY+, Scientific Technical Committee (STC) and La Silla Paranal Committee, European Southern Observatory, Garching, Germany, October 2021
• A New Era of Interferometry with GRAVITY(+), IPAG - Institut de Planétologie et d'Astrophysique, Grenoble, France, October 2021
• Great Times Ahead, European Southern Observatory 2020 Nobel Prize Celebration, Santiago Chile and Garching Germany, September 2021
• Infrared Interferometry of the Galactic Center Black Hole, Vitual Annual Meeting of the German Astronomical Society, September 2021
• An Experimentalists View on Black Holes and Gravity – the Galactic Center Black Hole, 20th Lomonosov Conference, Moscow, Russia, August 2021
• The Universe in 3D Motion - from SINFONI to GRAVITY towards the Future, Tycho Brahe Prize Talk, European Astronomical Society Annual Meeting, Leiden, The Netherlands, June 2021
• GRAVITY+ All-Sky, High-Contrast, Milli-Arcsecond Optical Interferometric Imaging and Spectroscopy, European Astronomical Society Annual Meeting, Leiden, The Netherlands, June 2021
• A New Era of Interferometry with GRAVITY, Heidelberg Joint Astronomical Colloquium Heidelberg, Germany, June 2021
• A New Era of Interferometry with GRAVITY, Astrophysics Colloquium, University of Vienna, June 2021
• A New Era of Interferometry with GRAVITY, Sydney Institute for Astronomy, The University of Sydney, Australia, April 2021
• Infrared Interferometry of the Galactic Center Black Hole, Extreme Gravity Mini Symposium, Erlangen Centre for Astroparticle Physics, Friedrich-Alexander Universität Erlangen-Nürnberg, Germany, April 2021
• A New Era of Interferometry with GRAVITY, Dunlap Institute for Astronomy & Astrophysics Colloquium, University of Toronto, Canada, March 2021
• GRAVITY+ – All-Sky, High-Contrast, Milli-Arcsecond Optical Interferometric Imaging and Spectroscopy, The Infrared Sky at Milli- and Microarcsecond Resolution with GRAVITY+ Online Workshop: Garching, Germany, February 2021
• Next Decade of Galactic Center Black Hole Observations with Infrared Interferometry and 30-40m Telescopes, Next Generation EHT Conference 2021, USA, February 2021
• General Relativistic Effects in Stellar Orbits around the Galactic Center Black Hole with GRAVITY, Revealing the Milky Way with GAIA workshop, Heidelberg, Germany, February 2021
• The Discovery of the Massive Black Hole in the Center of the Galaxy, Iberian String 2021, Lisbon, Portugal, January 2021
• GRAVITY+: All-Sky, High-Contrast, Milli-Arcsecond Optical Interferometric Imaging and Spectroscopy, DIAS Astronomy & Astrophysics Seminar, Dublin, Ireland, January 2021
• Recent GRAVITY Results on the Galactic Center Black Hole, 43rd COSPAR Scientific Assembly, Sydney, Australia, January 2021
• A New Era of Interferometry with GRAVITY, SPIE Astronomical Telescopes and Instrumentation, Los Angeles, California, USA, December 2020
• GRAVITY+: All-Sky, High-Contrast, Milli-Arcsecond Optical Interferometric Imaging and Spectroscopy, Instituto de Astrophysica de Andalucia IAA-CSIC, Granada, Spain, November 2020
• Keep the focus - The instruments revealing the Galactic Center black hole – speckle interferometry, adaptive optics, imaging spectroscopy, interferometry, NYRIA Virtual Workshop, Garching, Germany, October 2020
• GRAVITY, the Galactic Center, Relativity, and Massive Black Holes, Annual Science Meeting of the Excellence Cluster Origins, Garching, Germany, December 2019
• GRAVITY, the Galactic Center, Relativity, and Massive Black Holes, MPIfR Colloquium, Bonn, Germany, November 2019
• New Faces of Black Holes Uncovered by GRAVITY The Beauty of Dynamics, 2019 JSI Workshop, Annapolis, Maryland, USA, November 2019
• GRAVITY and VLTI – The Harvest from the First Two Years (Galactic Center, AGN, and Exoplanets), and a Bright Future ahead, ASIAA Colloquium, Taipei, Taiwan, R.O.C., July 2019
• The Galactic Center Black Hole – Testing Einstein´s General Relativity and the Black Hole Paradigm, KIT Colloquium, Karlsruhe, Germany, June 2019
• GRAVITY : Towards faint science, all sky milliarcsec optical interferometric imaging, The Very Large Telescope in 2030, Garching, Germany, June 2019
• Testing General Relativity in the Galactic Center, 100 Years @ Sundy Eddington Celebration, Principe, Sao Tome, May 2019
• General Relativistic Effects Around the Galactic Center Black Hole, APS Meeting 2019, Denver, Colorado, USA, April 2019
• 28 yrs of Galactic Center Observation from the La Silla and Paranal Observatories, The La Silla Observatory - from the inauguration to the future, La Serena, Chile, March 2019
• The Galactic Center Black Hole with GRAVITY: Orbital Motion Close to the Last Stable Orbit during a Flare, and General Relativistic Effects in the Orbit of Stars, CfA Colloquium, Cambridge, Massachusetts, USA, February 2019
• GRAVITY Tests of General Relativity and the Black Hole Paradigm in the Galactic Center, BHI Colloquium, Cambridge, Massachusetts, USA, February 2019
• Relativity and Stellar Orbits, invited talk, The Central Arcsecond: Towards Testing General Relativity in the Galactic Center, Ringberg, Germany, October 2018
• The S2 Peri-Passage - General Relativistic Effects in Stellar Orbits around the Galactic Center Black Hole, colloquium, Munich Joint Astronomy Colloquium, Garching, Germany, July 2018
• Breaking the Limits: Early Science with the GRAVITY Interferometer, SPIE Astronomical Telescopes + Instrumentation, Austin, Texas, USA, June 2018
• GRAVITY in the Galactic Center, Stellar Dynamics in Galactic Nuclei IAS, Princeton, New Jersey, USA, November 2017
• The Massive Black Hole in the Galactic Center, Reaching New Heights in Astronomy, Garching, Germany, August 2017
• Approaching the Event Horizon of the Galactic Center Black Hole, DPG Tagung, Bremen, Germany, March 2017
• First Light of GRAVITY, SPIE Astronomical Telescopes + Instrumentation, Edinburgh, Scotland, UK, June 2016
• Optical/IR Facilities, Perspectives of Astrophysics in Germany 2015-2030, Potsdam, Germany, December 2015
• The Centre of the Milky Way, ESO in the 2020s, Garching, Germany, January 2015
• The Galactic Center - Black Hole, Stars, Gas, and Gravity, RTG colloquium, HWK, Delmenhorst, Germany, December 3, 2014
• The Galactic Center Laboratory for Fundamental Physics, Fundamental Physics Workshop, ESO, Garching, Germany, 17 September 2014
• GRAVITY getting ready for ESO's VLT Interferometer, SPIE Astronomical Telescope + Instrumentation, Montreal, Canada, 24 June 2014
• GRAVITY getting ready for ESO's VLT Interferometer, La semaine de la SF2A, Paris, 3 June 2014
• The Galactic Center Black Hole - Approaching the Event Horizon, Physikalisches Kolloquium, Universität Bremen, 12 December 2013
• Infrared Interferometry of the Galactic Center Black Hole with GRAVITY, Gas Dynamics and Star Formation in the Extreme Environment of Galactic Nuclei, Ringberg Castle, Germany, 22 March 2013
• The Galactic Center Black Hole - Approaching the Event Horizon, Colloquium of the Physics Department of Instituto Superior Técnico, Lisbon, Portugal, 6 March 2013
• Testing general relativity with submm and infrared interferometry of SgrA*, Strong Gravity beyond GR: from theory to observations, Instituto Superior Técnico, Lisbon, Portugal, 5 March 2013
• Exploring physics close to the Galactic Center black hole with infrared and submillimeter interferometry, DPG-Frühjahrstagung, Jena, 28 February 2013
• Approaching the Event Horizon of SgrA* with GRAVITY and the EHT, Galaxy and Black Hole Evolution at High Redshift, Jerusalem, Israel, 15 October 2012
• GRAVITY: A preview, Annual Meeting of the Astronomische Gesellschaft 2012, Hamburg, Germany, 27 September 2012
• Riesenteleskope und Weltraumastronomie, Lüscher-Lectures, Akademie für Lehrerfortbildung und Personalführung, Dillingen, Germany, 18 September 2012
• GRAVITY: Observing the Universe in motion, SPIE Astronomical Telescopes and Instrumentation, Amsterdam, Netherlands, 3 July 2012
• Infrared observations and interferometry of Sgr A*, From stars to black holes: mm-VLBI with ALMA and other telescopes, ESO, Garching, Germany, 27 June 2012
• The instruments behind the discovery of the galactic center black hole and the origin of the orbiting stars, Black holes and the centre of the galaxy: The international Crafoord Prize Symposium in Astronomy, Lund, Sweden, 14 May 2012
• GRAVITY - Exploring Physics close to the Galactic Center Black hole, COST conference: Black Holes: From Quantum To Gravity, Malta, 26 April 2012
• GRAVITY - Observing the Universe in Motion, Institut de Planétologie et d'Astrophysique de Grenoble, Grenoble, France, 14 February 2012
• The Galactic Center: A short review, a sneak peek at selected recent papers, and real-time observations of an in-falling gas cloud, EII working group meeting on AGNs and the galactic center, Lisbon, Portugal, 29 November 2011
• GRAVITY, Ten Years of VLTI Conference: from first fringes to core science, Garching, Germany, 26 October 2011
• GRAVITY’s fatal attraction, Max-Planck-Institute for Astronomy, Heidelberg, Germany, 4 July 2011
• GRAVITY: Probing Strong Gravity with the VLT Interferometer, Informal Discussion, European Southern Observatory, Garching, Germany, 13 April 2011
• GRAVITY: Probing Physics Close to the Event Horizon of the Galactic Center Black Hole, Colloquium, Observatory of Strasbourg, Strasbourg, France, 14 January 2011
• GRAVITY: Probing Strong Gravity with the VLT Interferometer, TEXAS 2010: 25th Symposium on Relativistic Astrophysics, Heidelberg, Germany, 9 December 2010
• Probing Physics Close to the Event Horizon of the Galactic Center Black Hole with GRAVITY, Joint Seminars on Gravity: Theory meets observations @ SIM and CENTRA, Laboratory of Systems, Instrumentation and Modeling for Environment and Space Sciences and Technologies, Lisbon, Portugal, 9 March 2010
• Imaging and astrometry of black holes at radio- and infrared wavelengths, Probing Strong Gravity near Black Holes, Prague, Czech Republic, 18 February 2010
• Probing the Galactic Center with GRAVITY, Stars and Singularities – The physics of dense cusps around massive black holes, Weizmann Institute of Science, Rehovot, Israel, 9 December 2009
• Galactic Science with ESO Adaptive Optics, 20 Years of Adaptive Optics at ESO, ESO, Garching, Germany, 27 November 2009
• The Galactic Center: The Ideal Laboratory for Studying Supermassive Black Holes, Relativity in Fundamental Astronomy: Dynamics, Reference Frames, and Data Analysis, IAU Symposium 261, Virginia Beach, USA, 29 April 2009
• An Update on the Galactic Center black hole: From the stars to the event horizon, from adaptive optics with NACO/SINFONI to interferometry with GRAVITY, Excellence Cluster Area F Science Talk, Technical University Munich, Garching, Germany, 16 July 2008
• 3D spectroscopy with adaptive optics, SPIE Astronomical Instrumentation, Marseille, France, 23 June 2008
• GRAVITY: Microarcsecond astrometry and deep interfereometric imaging with the VLT, The Universe under the Microscope, Bad Honnef, Germany, 24 Apil 2008
• High Angular Resolution Astronomy with Adaptive Optics and Interferometry, Ringvorlesung: Methoden und Instrumentierung in der Kern-, Teilchen- und Astrophysik Garching, Germany, 30 January 2008
• A sharp look at the Galactic Center: Where we are and where we go, Hauptkolloquium MPIfR und AIUB, Bonn, Germany, 16 November 2007
• A sharp look to the Galactic Center black hole: where we are and where we go, Excellence Cluster Area F Science Meeting , Garching, Germany, 16 October 2007
• GRAVITY: Microarcsecond astrometry and deep interfereometric imaging with the VLT, Science with the VLT in the ELT Era, ESO, Garching, Germany, 11 October 2007
• The Galactic Center: The Nearest Laboratory for Studying Supermassive Black Holes, Theoretisch-Physikalisches Kolloquium, Technical University, Munich, Garching, 18 July 2007
• GRAVITY: Microarcsecond astrometry and deep interfereometric imaging with the VLTI or Probing GRAVITY close to the Schwarzschild horizon, DFG - NSF Astrophysics Research Conference, Washington, USA, 11 June 2007
• The next steps in GC research: Infrared, Celebrating 15 years of precision astronomy in the Galactic Center - Hot topics and observational challenges, Ringberg, Germany, 23 June 2007
• GRAVITY Continuing a dream …, EII Meeting, Heidelberg, Germany, 6 February 2007
• SERPIL/LIINUS for the LBT, AO at the LBT: Upgrades and their Science Drivers, Florence, Italy, October 2006
• The Galactic Center: The Nearest Laboratory for Studying Supermassive Black Holes, The Relativistic Universe, Wildbad Kreuth, Germany, February 2006
• SINFONI Science Highlights, Science Perspectives for 3D Spectroscopy, Garching, Germany, October 2005
• Faint Object Multiple Beam Combiner for the VLTI, VLTI Second Generation Instruments, Garching, Germany, April 2005
• SINFONI in the Galactic Center: young stars and IR flares in the central light month, The Paradoxes of Massive Black Holes: A Case Study in the Milky Way, Santa Barbara, USA, April 2005
• The Galactic Center: The nearest Laboratory for Studying Supermassive Black Holes, American Physical Society Meeting 2005, Tampa, USA, April 2005
• SPIFFI: Lessons learned from a Fast Track VLT Instrument, VLT/VLTI Instrumentation: Lessons learned, Garching, Germany, April 2003
• SPIFFI at the VLT: Lessons learned from low to high redshift, Euro3D Science Workshop, Cambridge, UK., May 2003
• Scientific Potential of Enhancing the Integral-Field Spectrometer SPIFFI with a Large Detector and High Spectral Resolution, Scientific Drivers for ESO Future VLT/VLTI Instrumentation, Garching, Deutschland, June 2001
• The Stellar Content of the Most Massive Starforming Regions in the Galaxy: Prospects for Observations with CONICA, Massive Star Formation, Weimar, Deutschland, May 2001
• Evidence in Favour of IMF Variations, Starburst Galaxies: Near and Far, Schloß Ringberg, Tegernsee, Germany, September 2000
• The Initial Mass Function of the Most Massive Starforming Regions, Science with the LBT, Schloß Ringberg, Tegernsee, Germany, July 2000
• Near-Infrared-Spectroscopy with Extremely Large Telescopes: Integral-Field-versus Multi-Object-Instruments, Extremely Large Telescopes, Baeckaskog, Sweden, June 1999
• Stellar Population of NGC 3603 from Adaptive Optics Observations, The 38th Herstmonceux Conference, Cambridge, England, July 1996