Tag

Tidal Tomography

All articles tagged with #tidal tomography

space-and-astronomy23 hours ago•56 min saved

Mars' southern mantle runs hotter, reshaping its interior story

New gravity data analyzed with tidal tomography from three NASA Mars missions (MGS, Mars Odyssey, MRO) show the southern hemisphere’s mantle is 200–400 C warmer than the north, possibly partly molten. This non-symmetric interior helps explain Mars’s pronounced north–south dichotomy and has implications for its volcanic and magnetic history, hydrology, and crustal evolution. The finding, published in Nature, points to future missions probing the planet’s interior.

via Yahoo|

#gravity #mantle #mars

space1 day ago•163 min saved

Mars interior revealed: hotter southern mantle beneath a cooler northern hemisphere

A gravity-based study using archival data from Mars Global Surveyor, Mars Odyssey, and Mars Reconnaissance Orbiter with a tidal tomography method shows the southern mantle is 200–400°C warmer than the north, implying a hotter, potentially partially molten interior that helps explain Mars’ hemispheric surface dichotomy and seismic/magnetic clues. The exact cause—ancient giant impact vs crustal thickness differences—remains uncertain, and future gravity data could test the 3D interior model.

via Space|

#gravity #interior #mantle

science4 days ago•4 min saved

Hidden Heat in Mars’ Mantle Reveals Clues to the North-South Divide

Using tidal tomography on 16 years of data from MGS, Odyssey, and MRO, scientists found Mars’ southern mantle is 400–750°F hotter than the north, a thermal asymmetry that mirrors the crustal dichotomy and may result from mantle convection or long-lasting insulation. The finding doesn’t settle the cause but introduces a powerful, non-landing method for probing planetary interiors and insights into Mars’ past habitability.

via 404 Media|

#dichotomy #mantle #mars