Taking aim, preparing for landing

The prominent circular structure in this image – taken by NASA’s Mars Reconnaissance Orbiter – has been called Jezero Crater. It is the chosen landing site of the Mars 2020 mission, and as such a focus of frequent observation from above.

The image has been artificially coloured by NASA staff, but those colours correspond to different types of sediments – notably, clays and carbonates – carried through channels carved billions of years ago when Mars boasted plenty of water.

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