In our view, to get the most from space-science programmes — in terms of impacts on research and reputation — government agencies and institutions need to choose, manage and assess missions in ways that optimize the scientific outputs. As heads of space-science agencies and institutes from around the world gather at a forum next week in Beijing to identify principles for maximizing returns on such missions, we call on them to put science first.

Put research goals first when prioritizing and managing national and international projects, urge Ji Wu and Roger Bonnet.