Tim Peake (Author) Tim Peake is a European Space Agency astronaut. He finished his 186-day Principia mission working on the International Space Station for Expedition 46/47 when he landed back on Earth 18 June 2016. He is also a test pilot and served in the British Army Air Corps. Tim is a Fellow of a number of UK science, aviation and space-based organisations. He is also a STEM ambassador. He is married with two sons.The European Space Agency (Author) The European Space Agency is Europe's gateway to space, and boasts 22 member states. Its mission is to shape the development of Europe's space capability and ensure that investment in space continues to deliver benefits to the citizens of Europe and the world.