The Committee on Space Research (COSPAR) will hold its 42nd Scientific Assembly in Pasadena, California, USA, on 14-22 July, 2018. The COSPAR Scientific Assemblies supply a forum to all scientists involved in space research for the presentation of their latest scientific results, the exchange of knowledge and also the discussion of space research problems. Abstract submission is now open. The deadline is February 9, 2018. http://cospar2018.org