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.
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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 the Maftet region, a block of material to the right (B) has a similar shape and appearance to the depression on the left (A). The block is around 100 m in diameter, and the pit is around 150 m across. One theory is that this is evidence of surface disruption and material ejection produced by subsurface gas pressure build-up of a super-volatile such as carbon monoxide or carbon dioxide. However, the proposal needs to overcome the high porosity of the nucleus and explain how gas can be trapped in a pocket so that pressure can build. Mechanisms producing subsurface ice barriers (through volatile transport to colder areas within the nucleus) need to be considered.
An unlabelled version of this image is available here.
Credits: ESA/Rosetta/MPS for OSIRIS Team MPS/UPD/LAM/IAA/SSO/INTA/UPM/DASP/IDA