Mercury is Shrinking, But Faster Than Previously Thought

Mercury's surface has been found to be shrinking faster than previously thought, according to a study by the German Aerospace Center's Institute of Space Research. The study suggests that the rate of contraction is 10% to 30% higher, up to 23 km in diameter. This finding challenges previous estimates and could reshape our understanding of Mercury's geological history. The research combined geological maps with new data on surface roughness to identify patterns in contraction. The results imply that Mercury's diameter has been shrinking by 7.5 km to 23 km over its lifetime, rather than the previously estimated 4 to 16 km. The team emphasizes that the updated figures might be an underestimate due to the limitations of the MESSENGER mission's data. The findings have implications for understanding Mercury's interior structure and how rocky planets evolve around their stars. The study highlights the importance of continued research with future missions like BepiColombo to improve our knowledge of Mercury's surface and interior.

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