Recordings of the interior of Mars have just delivered the most precise measurement of the red planet's spin yet, and the results are a confusing surprise. According to data from the now-retired InSight lander, Mars' rotation is accelerating each year by around 4 milliarcseconds.
have just delivered the most precise measurement of the red planet's spin yet, and the results are a confusing surprise.
According to data from the now-retired InSight lander, Mars' rotation is accelerating each year by around 4 milliarcseconds. That's a very small amount – shortening the length of a Mars day by just a fraction of a millisecond every Martian year – but the reason for it is not immediately apparent. However, the finding could lead us to a better understanding of Mars and its past evolution. The current forerunning hypotheses explaining the acceleration are long-term trends – such as accumulating material at the polar ice caps – and interior dynamics.of NASA's Jet Propulsion Laboratory."I've been involved in efforts to get a geophysical station like InSight onto Mars for a long time, and results like this make all those decades of work worth it.
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