<h1>Ganymede</h1>
<ul>
<li>Largest of the Galilean <a href="/second-brain/moon">moon</a>s</li>
<li>Made of ice</li>
<li>Has a great deal of cratering</li>
<li><math xmlns="http://www.w3.org/1998/Math/MathML"><semantics><mrow><mfrac><mn>1</mn><mn>4</mn></mfrac></mrow><annotation encoding="application/x-tex">\frac{1}{4}</annotation></semantics></math>41​ of the surface seems old (heavily cratered) and the rest formed more recently</li>
<li>Has differentiated like the <a href="/second-brain/terrestrial-planet">terrestrial planet</a>s</li>
<li>Has a magnetic field
<ul>
<li>Signature of a partially molten interior</li>
</ul>
</li>
<li><a href="/second-brain/tidal-force">Tidal force</a>s from <a href="/second-brain/jupiter">Jupiter</a> have probably helped heat its interior and trigger major convulsions on its crust</li>
</ul>
<a href="/second-brain/moon">Moon</a> <a href="/second-brain/jupiter">Jupiter</a>

Ganymede

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