When you look at pictures of other planets, their surface seems to be made up of a huge collection of craters (which I imagine are from meteorites). Planets such as [Mercury](https://cdn.mos.cms.futurecdn.net/PFQ97KNjjTebMzenT3GeKd-970-80.jpg.webp), [Venus](https://scitechdaily.com/images/Venus-Global-View-Magellan-Mapping.jpg), [Mars](https://images.newscientist.com/wp-content/uploads/2016/07/19111442/pia00407.jpg?width=800), [Pluto](https://img.welt.de/img/wissenschaft/weltraum/mobile147668745/7032502177-ci102l-w1024/Zwergplanet-Pluto-2.jpg) (yes, not a planet) and even closer to home, the [moon](https://img.welt.de/img/wissenschaft/weltraum/mobile147668745/7032502177-ci102l-w1024/Zwergplanet-Pluto-2.jpg). But when you take a look at the [Earth](https://images2.fanpop.com/image/photos/9400000/Earth-Wallpaper-planet-earth-9444615-1024-768.jpg), no craters are visible. Why is that?
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Fun fact: Earth & Titan are the only bodies in our solar system with rain, rivers, & seas on a solid surface. (On Titan, the solid ground is ice and the liquid is methane). Moving liquid washes away smaller craters and fills larger ones.
The four giants (Jupiter, Saturn, Uranus, Neptune) are in a different category altogether. Their atmospheres gradually become “supercritical fluid” so there isn’t a surface where craters can form.
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