The European Space Agency (ESA) is Europe’s gateway to space. 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.
Find out more about space activities in our 23 Member States, and understand how ESA works together with their national agencies, institutions and organisations.
Exploring our Solar System and unlocking the secrets of the Universe
Go to topicProtecting life and infrastructure on Earth and in orbit
Go to topicUsing space to benefit citizens and meet future challenges on Earth
Go to topicMaking space accessible and developing the technologies for the future
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In November 2016, the ExoMars Trace Gas Orbiter tested its four science instruments during two orbits of Mars. This figure shows when the Atmospheric Chemistry Suite (ACS), the Colour and Stereo Surface Imaging System (CaSSIS), and the Nadir and Occultation for Mars Discovery (NOMAD) operated during the second orbit, 24–28 November. The neutron detector FREND collected data during the entire period. For ACS, CaSSIS, and NOMAD, dashed lines indicate periods of testing and solid lines are when scientific measurements were made. Mars’ innermost moon Phobos is also indicated; a number of measurements focused on this moon during the second orbit.