In a gorgeous animation, Malin Christersson shows how much simpler it is to plot out celestial mechanics when you assume that all the bodies in our solar system are in orbit around the sun, rather than the other way around.
Given the lack of a universal reference point, it's not exactly true that anything goes around anything else -- you can plot out the universe as though any point in it were stationary and everything else was moving in reference to it. But when you adopt the heliocentric model, the number of equations you have to do in order to make sense of things drops by an enormous amount, to the point where it's hard to imagine why anyone wouldn't want to default to this model.
My dear old friend Possum Man told me about a trig class in his Waldorf school where the teacher showed them how to calculate the position of the planets in a geocentric universe, to drive home the real meaning of relativity.
Christersson's graph is part of a great potted history of geocentrism and heliocentrism, itself part of a self-directed tutorial on trigonometry.
Trigonometry - Heliocentrism and Geocentrism [Malin Christersson]
(via Bruce Sterling)
Making a solar hot-dog oven is a science fair standby, but JohnW539's CNC-milled Sundogger Instructable really digs into the classroom portion, drawing on the creator's experience as a physics/astronomy/computer science prof at Middle Tennessee State University.
Three basement levels of the Louvre are given over to the Centre de recherche et de restauration des musées de France (C2RMF), which provides research and restoration services to France's 1,200+ art museums and galleries.
When I was very little, my big brother brought me in to school for show-and-tell. In the lunchroom, a kid fired a rubber band that hit me right in the face. I still remember the welt. This fascinating video uses high-speed footage to explain the physics behind this age-old form of weaponry. It also reminded […]
If you’re part of the maker community, you know Make:. Though Make: magazine is off the shelves as of this year, the eBooks and resources put out by Maker Media are still a fantastic resource for the new generation of tinkerers, hackers, and robotics geeks. If you’re in that tribe, listen up: they’ve released a […]
Life isn’t getting any less hectic, and pressure cookers are a quick, healthy solution for a growing number of kitchens. But if you thought your Instant Pot was versatile, there’s a major upgrade on the market: The Yedi 9-in-1 Total Package Instant Programmable Pressure Cooker. If you’ve somehow never used a pressure cooker before, try […]
When it comes to data analytics or deep learning, there’s one language behind the apps and algorithms that power the biggest companies of today: Python. The best part about this tool is that as versatile as it is, it’s actually fairly easy to learn. But mastery? For that, you need more than just a beginners’ […]