"Mars' Surprising Spin: NASA InSight Study Reveals Increased Rotation Speed"

NASA's InSight lander has provided the most precise measurements of Mars's rotation, revealing that the planet is spinning faster. Using data from InSight's Rotation and Interior Structure Experiment (RISE), scientists found that Mars's rotation is accelerating by about 4 milliarcseconds per year, resulting in a slight shortening of the Martian day. The cause of this acceleration is still uncertain, but possibilities include ice accumulation on the polar caps or post-glacial rebound. RISE data also allowed scientists to measure Mars's wobble and estimate the size and shape of its liquid core.