https://www.youtube.com/watch?v=sKfIOjVOISI
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Throughout the Martian year, as measured by NASA’s Curiosity and Perseverance rovers on locations like Jezero and Gale craters, Mars’s different side — northern polar cap expands by nearly 15%, reaching up to 800,000 square kilometers during winter and retreating to around 680,000 square kilometers in summer. Unlike Earth’s relatively stable polar regions, this cap undergoes significant seasonal variation. Throughout the Martian year, it expands by nearly 15%, reaching up to 800,000 square kilometers during winter and retreating to around 680,000 square kilometers in summer. These shifts are driven by Mars’s thin atmosphere, which maintains an average surface pressure of just 6 millibars — less than 1% of Earth’s — and by its elliptical orbit, which creates sharp contrasts in solar radiation between seasons.
This dynamic behavior isn’t just visible from orbit. Instruments aboard NASA’s rovers like Curiosity and Perseverance, operating thousands of kilometers from the poles, have captured the planet’s subtle atmospheric responses — signs of distant ice sheets in changing sky conditions and light scattering patterns. These surface perspectives complement orbital data, painting a fuller picture of Mars as a planet in motion.
NASA’s Mars Global Surveyor detected something even more surprising: subtle variations — up to 2.7% — in Mars’s magnetic field strength, appearing to sync with the polar cap’s expansion and contraction. These fluctuations emerge over roughly six Martian months and are concentrated near the poles, with maximum intensity along the outer margins of the shifting ice.
Mars lacks a global magnetic field like Earth’s. Instead, it retains localized crustal magnetism, remnants of an ancient dynamo — more than 100 times weaker than Earth’s. Yet even this patchwork field responds, subtly, to surface activity. One hypothesis suggests that as the polar ice cap grows and recedes, it may alter the subsurface’s electrical conductivity. These changes — possibly driven by shifting brines or variations in subsurface ionization — could induce weak electromagnetic currents.
Visualisations of Mars planet and voice — by iGadgetPro
Credit for real RAW-images of Mars: NASA/JPL-Caltech/ASU | nasa.gov | NASA/JPL-Caltech/MSSS
All NASA’s RAW-images were colorized, processed and edited by iGadgetPro
Timecodes
0:00 – Mars Exploration Begins with NASA Rovers
0:33 – Mars’ Missing Features in Curiosity’s View in 4K
1:27 – Rapid Formation of Mars Revealed
2:33 – Perseverance and InSight Uncover Mars’ Core Secrets
4:14 – Is Mars Truly a Dead Planet?
7:07 – Mars’ Geological Limits Exposed
9:15 – Atmospheric Loss on the Red Planet
#marsin4k #mars360 #nasamars #Mars #NASA #Curiosity #Perseverance #MarsPolarCap #RoverFootage
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