Scientists have made an exciting discovery about Mars using data collected by NASA’s InSight Mars lander. Despite losing contact with the lander in December 2022, scientists have continued to analyze the data and have found that Mars’ rotational speed is increasing. The research, led by Sebastien Le Maistre of the Royal Observatory of Belgium, utilized InSight’s Rotation and Interior Structure Experiment (RISE) instrument to make precise measurements of Mars’ rotation. The team found that Mars’ rotational speed is accelerating by approximately four milliarcseconds per year squared, resulting in a decrease in the length of the Martian day by a fraction of a millisecond per year. This increase in rotation is believed to be caused by factors such as ice accumulation on the polar ice caps or post-glacial rebound. The RISE instrument also revealed how Mars wobbles due to the movement of its molten metal core. The measurements made by InSight are the most accurate ever taken and have provided valuable insights into the planet’s characteristics. By utilizing radio waves and analyzing the Doppler shift in a signal beamed from Earth to InSight, the scientists were able to determine Mars’ rotational speed. Despite challenges such as small variations in signal frequencies
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