back to article Mars' iron core surrounded by molten rock, seismic studies show

Two new studies from a NASA Mars probe suggest the red planet's core is surrounded by a layer of molten rock, and the core is smaller than previously thought. Launched in 2016, the InSight lander's Seismic Experiment for Interior Structure (SEIS) project provided data in 2021 that suggested the presence of a large but low- …

  1. elsergiovolador Silver badge

    Units

    150 kilo miles?

  2. Potemkine! Silver badge

    Question: if there's a liquid iron core, why is the magnetic field around Mars so degraded?

    1. This post has been deleted by its author

    2. elsergiovolador Silver badge

      Because Mars is a dump. There isn't even one coffee shop, not to mention they have not even bothered to maintain any green space. So no wonder their iron core has been caught lacking.

    3. Brewster's Angle Grinder Silver badge

      You need energy to sustain a magnetic field. That energy has run out. Somebody needs to give Mars a vigorous shake to get it running again.

  3. TVU Silver badge

    Question: if there's a liquid iron core, why is the magnetic field around Mars so degraded?

    That is an excellent question and it appears that the convective currents in Mars' liquid core reduced and there are a number of theories* about how that happened.

    The net result is that the planetary magnetosphere effectively died and that then allowed the strong solar winds to interact directly with the planet’s atmosphere and strip it away. Mars' real problem is that it only has 1/9th of the mass of Earth so that its core was always going to cool down more quickly and the rest is history. You would probably need a planet with at least 1/3rd of the mass of Earth for a planetary magnetosphere to develop and to be self sustaining for multiple billions of years.

    *This is just one option - https://www.universetoday.com/154461/we-might-know-why-mars-lost-its-magnetic-field/

  4. trevorde Silver badge

    Bigger question

    Who cares? When are we sending Elon Musk there?

POST COMMENT House rules

Not a member of The Register? Create a new account here.

  • Enter your comment

  • Add an icon

Anonymous cowards cannot choose their icon

Other stories you might like