Interessante questo modello di sistema solare di Piotr Kaczmarek (dynamicdiagrams). Mette a confronto i due massimi sistemi :-D, permette di regolare la data e la velocita’ dei pianeti, ma soprattutto permette di simulare il sistema tolemaico.
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I got frustrated with NASA and made this video. NASA is the most fascinating, adventurous, epic institution ever devised by human beings, and their media sucks. Seriously. None of their brilliant scientists appear to know how to connect with the social media crowd, which is now more important than ever. In fact, NASA is an institution whose funding directly depends on how the public views them.