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The Apollo astronauts' footsteps can remain theoretically forever on the Moon as it has no atmosphere. Mars does have an atmosphere but a very thin one. Its pressure ranges from 72 Pa (0.0104 psi) on the top of Olympus Mons to 1240 Pa (0.18 psi) in the Hellas Basin. Since this is quite a difference, I'm curious on both scenarios: how long would astronauts' footprints remain on Mars in case astronauts land on Olympus Mons, and in case they land in the Hellas Basin? Due to the low atmospheric pressures, the winds on Mars aren't by far as strong as on Earth.

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It would not last very long, as Mars is notorious for the dust storms present despite the low pressure of the atmosphere which sometimes kick up enough dust to be seen by telescopes on Earth. so technically it won't last forever like on the moon.

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    $\begingroup$ But there are little dust storms on Olympus Mons' peak, are there? $\endgroup$
    – Giovanni
    Apr 30 at 10:27
  • $\begingroup$ Question asks "..., I'm curious on both scenarios: how long would astronauts' footprints remain on Mars in case astronauts land on Olympus Mons, and in case they land in the Hellas Basin?" Actually I don't think we have a question like "How's the weather atop Olympus Mons?" or "Did the top of Olympus Mons disappear during the MY28 event?" yet; this might be a good time to ask! (1, 2) $\endgroup$
    – uhoh
    Apr 30 at 10:56
  • $\begingroup$ Question asks "..., I'm curious on both scenarios: how long would astronauts' footprints remain on Mars in case astronauts land on Olympus Mons, and in case they land in the Hellas Basin?" Actually I don't think we have a question like "How's the weather atop Olympus Mons?" or "Did the top of Olympus Mons disappear during the MY28 event?" yet; this might be a good time to ask! (1, 2) $\endgroup$
    – uhoh
    Apr 30 at 11:02
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    $\begingroup$ This answer would be much more useful if you could provide quantitative data and/or calculatations as to what it takes to smooth, say, 10-mm 'footprint' features in Martian dust. $\endgroup$ Apr 30 at 13:06
  • $\begingroup$ The answer is probably a few years perhaps in Hellas Basin. For Olympus Mons the period would be much longer may be thousands or even millions of years but the calculation would be very difficult. The true answer is we don't know in any detail or with much accuracy. $\endgroup$
    – Slarty
    Apr 30 at 16:47

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