The actual size of the planets in the solar system is explained in this short video by a NASA veteran

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La véritable taille des planètes du système solaire expliquée dans cette courte vidéo d'un ancien de la NASA

Hardware News The true size of the planets in the solar system explained in this short video by a former NASA employee Posted on 08/16/2022 at 16:40 The question of the size of the planets in the solar system has been decided obviously for a long time. Is it uninteresting though? far from there When it comes to space, infinitely large size scales are extremely complex for the human brain. This video made by James O’Donoghe, former employee of NASA and currently in the service of JAXA (Japan Aerospace Exploration Agency) shows it very well. How big is the solar system really? A short explanatory video from a former NASA Yes, it would be possible to answer this question in a cold and austere way. We show you some figures, some graphs, a raw scientific publication and that’s it, case solved. This answer, while still technically correct, would be extremely fuzzy in the minds of the general public. The point of popularizing science is to make abstruse notions tangible for people like you and me. The case of the infinitely large is a perfect illustration. For these scales of size to be assimilated by our imagination, it is essential to use original tools. James O’Donoghe got it – his short video on Twitter makes it very clear. As mentioned in the introduction, James O’Donoghe is a former NASA researcher, currently working at JAXA in Japan. His great specialty is the study of the atmosphere of gas giants such as Jupiter, Saturn or billions of other exoplanets (we call exoplanets the planets outside the solar system) The size and speed of the planets in the solar system: literally unimaginable numbers As you can see, this type of achievement is extremely effective. In less than 1 minute, everyone can see what our solar system looks like. For information, here we are talking about planets whose diameter can reach tens of thousands of kilometers. Jupiter, the giant of our solar system, has a diameter of more than 139,000 kilometers, a number too huge to imagine. The mind of homo sapiens did not evolve to grasp interplanetary distances. The process of natural selection has no reason to preserve an evolutionary trait that allows us to understand that the small luminous ball in the sky is a star 1.39 million kilometers in diameter, everything becomes clearer as soon as the scales are made more human . Mercury and its 4,879 km diameter, the smallest planet in the solar system (dwarf planets like Pluto or natural satellites like the Moon don’t count), is pretty easy to imagine. Its diameter is more or less the size of a Paris – New York. While it’s really the former NASA member’s tweet that’s currently buzzing on the internet, the video exists in better quality on YouTube. So here’s a link to 55 seconds of explanations of the absurd dimensions of the universe in Full HD 60 FPS. Now that you have a better understanding of the size of the various planets in the solar system, you still need to grasp another essential point: the rotation speed of the stars. Yes, if a day on earth lasts 24 hours, it is far from being like that everywhere. On Venus, for example, it takes about 5830 hours to observe a sunset or sunrise. This corresponds to 243 Earth days. By contrast, huge Jupiter makes one revolution every 9 hours and 55 minutes (the gas giant rotates at 45,000 km/h).
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