Ganymede with exaggerated topography scaled one in sixty million

prusaprinters

<p>This model was updated using the topographic map present on Steinbrügge (2019), exaggerated 30 times, since Ganymede topography is really flat. It was rendered using MATLAB R2016a.</p><p>The file's names explained: <i>name_1_x_10_y.stl</i> is 1 : x* 10^y. So _1_6_10_7 is 1:600000000 or one in 60 million.&nbsp;</p><h4>J3 Ganymede</h4><p>Ganymede is the largest moon of Jupiter as well as of the Solar System. It's sometime called a "planet like moon", being larger in diameter than <a href="https://www.prusaprinters.org/prints/57282-mercury-with-exaggerated-topography-scaled-one-in-">Mercury</a>, but having a 45% of the planet mass. This is because it's largely composed of water ice, being the largest "icy body" (aka. an object composed of a great fraction of water, with a solid surface). Water is one of the least viscous material of celestial bodies. That's why objects with ice composition can be rounded at smaller size, like <a href="https://www.prusaprinters.org/prints/57256-mimas-scaled-one-in-ten-million">Mimas</a>; or bigger objects like Ganymede can be extremely rounded, because when a moon or an asteroid melts (usually in its early history) it turns into a rounded shape, and a less viscous material could easily flow to fill the irregular terrain. Ganymede has a fully differentiated nucleus, rich in iron, which makes it the only moon with a substantial magnetic field. Its surface has two main types of geography: one old, dark, heavily cratered, similar to that of <a href="https://www.thingiverse.com/thing:3686246">Callisto</a>, and a younger, lighter and grooved terrain. However, this difference is not visible because of the low resolution of the topographical maps. <a href="https://www.prusaprinters.org/prints/57270-io-with-known-topography-scaled-one-in-twenty-mill">Io</a>, <a href="https://www.prusaprinters.org/prints/57273-europa-with-approximate-topography-scaled-one-in-t">Europa</a> and Ganymede are locked in a 1:2:4 orbit resonance, which means that each Ganymede's orbit around Jupiter, Europa makes 2, and Io makes 4.</p><ul><li><strong>Type:</strong> Satellite.</li><li><strong>Orbit:</strong> Jupiter.</li><li><strong>Orbital period:</strong> 7.154 d</li><li><strong>Composition:</strong> Icy body. Differentiated interior. Subsurface ocean.</li><li><strong>Density:</strong> 1.936 g/cm3.</li><li><strong>Dimensions:</strong> 5268.2 km</li><li><strong>Model scale:</strong> 1:6x107 (9cm) 1:1.2x108 (4cm)</li></ul><h4>References</h4><ul><li><a href="https://www.researchgate.net/publication/334610556_Measuring_Ganymede%27s_Librations_with_Laser_Altimetry">Steinbrügge, Gregor &amp; Steinke, Teresa &amp; Thor, Robin &amp; Stark, Alexander &amp; Hussmann, Hauke. (2019). Measuring Ganymede’s Librations with Laser Altimetry. Geosciences. 9. 320. 10.3390/geosciences9070320.</a></li><li><a href="https://www.mathworks.com/matlabcentral/fileexchange/4512-surf2stl">Surf to STL function for MATLAB&nbsp;</a></li></ul><h3>Other astronomical objects</h3><p><a href="https://www.prusaprinters.org/social/120859-tato_713/collections/49826">Inner Solar System</a></p><p><a href="https://www.prusaprinters.org/social/120859-tato_713/collections/49832">Artificial</a></p><p><a href="https://www.prusaprinters.org/social/120859-tato_713/collections/49820">Near Earth Asteroids</a></p><p><a href="https://www.prusaprinters.org/social/120859-tato_713/collections/49291">Main Belt Asteroids</a></p><p><a href="https://www.prusaprinters.org/social/120859-tato_713/collections/49829">Jovian System</a></p><p><a href="https://www.prusaprinters.org/social/120859-tato_713/collections/49828">Saturn System</a></p><p><a href="https://www.prusaprinters.org/social/120859-tato_713/collections/49830">Uranian System</a></p><p><a href="https://www.prusaprinters.org/social/120859-tato_713/collections/49345">Neptunian System</a></p><p><a href="https://www.prusaprinters.org/social/120859-tato_713/collections/49827">Centaurs</a></p><p><a href="https://www.prusaprinters.org/social/120859-tato_713/collections/49833">Comets</a></p><p><a href="https://www.prusaprinters.org/social/120859-tato_713/collections/49341">Trans Neptunian Objects</a></p><p><a href="https://www.prusaprinters.org/social/120859-tato_713/collections/49824">Extrasolar Objects</a></p><p><a href="https://www.prusaprinters.org/social/120859-tato_713/collections/49837">Sky Maps</a></p><p><a href="https://www.prusaprinters.org/social/120859-tato_713/collections/49831">Ancient</a></p><p><a href="https://www.prusaprinters.org/social/120859-tato_713/collections/49822">Speculative</a></p><p><a href="https://www.prusaprinters.org/social/120859-tato_713/collections/49821">Science Fiction</a></p>