Check out this 3D-printable model of Mars.
It has been developed as part of "A Touch of the Universe", a non-profit project for a tactile astronomy kit addressed to children with vision impairments.
Details and links in the model's description
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Planet Mars tactile model for the blind - Download Free 3D model by Astronomical Observatory - UV (@ameliaortizgil)
This is a tactile 3D model of the planet Mars made from elevation data obtained by NASA’s MGS mission. The model was created using Jordi Burguet’s Mapelia software (https:// github.com/jordibc/mapelia) and kindly revised by Garrett P. Carder from See3D. The North polar cap is smooth; the South Polar cap contains the logo of the University of Valencia Astronomical Observatory. The meridian corresponds to 0o longitude in the planet’s geographical coordinates. After tests, the best size for the globe has been found to be around 20 cm in diameter. Larger are cumbersome and smaller are confusing. The Mars model is part of “[A Touch of the Universe ] (https://astrokit.uv.es)”; it is licensed under the “A Touch Of the Universe” CC license: A Touch of the Universe by University of Valencia Astronomical Observatory is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License. - Planet Mars tactile model for the blind - Download Free 3D model by Astronomical Observatory - UV (@ameliaortizgil)