The Interface between observation and theory workshop took place 17-18�January 2019 and was kindly hosted by the University of Hertfordshire in Hatfield.

Over 40 delegates attended the workshop and they enjoyed the good range of talks from exoplanets to cosmology:

• �Great range of speakers, almost everyone got something relevant and useful�

• �The talks were given clearly with space for questions. Good to meet fellow researchers and have space for discussion.�

• One of the best aspects of the programme was the machine learning talk as it�s a new thing potentially useful for everybody.�

Thank you to all our speakers for participating in this event and making it a success:

Ben Burningham, University of Hertfordshire: Characterising exoplanets from theory and data driven perspectives.Noelia Noel, University of Surrey: Resolved stellar populations and star clusters in Local Group galaxies: Unravelling galaxy formation and evolution.Jim Dale, University of Hertfordshire: Modelling star formation in the Milky Way.Jim Geach, University of Hertfordshire: Machine-learning techniques in Astrophysics.Sebastian Hoenig, University of Southampton: Stars, dust, and outflows: Modelling the infrared emission from AGN.Claudia Maraston, University of Portsmouth: Stellar population synthesis models.Chiaki Kobayashi, University of Hertfordshire: Interpreting the Universe both near and far with cosmological simulations.

Thank you to the lead academics for organising this workshop � (Sugata Kaviraj, Jan Forbrichand, (all University of Hertfordshire), Sean Ryan (all University of Hertfordshire), Kathy Head (Research Administrator, University of Hertfordshire) and Cristobel Soares-Smith (GRADnet Manager, SEPnet).