The Physics Department is organising a Master Class in Astronomy for high-energy physics masters students. This Master Class will be supervised by Dr Y. Damerdji researcher at CRAAG (Centre de Recherche en Astronomie Astrophysique et Géophysique) and also a member of the DPAC (Data Processing and Analysis Consortium) of the Gaia space mission. The Master Class will take place on 31 January 2018 in Multimedia Room B31 in Block B, and will include lectures in the morning and a workshop in the afternoon.