Mysterious Increase in Mars' Rotation Speed Baffles Scientists
TL;DR Summary
NASA's InSight lander has collected data indicating that Mars is rotating more quickly than before, shortening the length of a Martian day by a fraction of a millisecond per year. The increased acceleration in rotation is believed to be caused by ice accumulation at the Martian poles or the rise of landmasses after being covered in ice. The findings, based on an analysis of InSight data, also revealed that Mars has a molten metal core with a radius estimated to be between 1,112 and 1,150 miles. Although InSight is no longer operational, its data has significantly contributed to our understanding of the red planet.
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