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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This multitemporal picture of a wide expanse of the Po River Valley is a combination of two images acquired on 30 June and 19 July 2003. Where the data input is similar for the two images a yellow-light green is produced. Where red is dominant denotes greater signal return for the June image, and in turn green for the July image. Used in this way, multitemporal images help identify changes in a landscape.