I make calming, satisfying simulations from real physics, maths and astronomy, plus short stories told with real physics

Run The Sim retweeted
This is the path Mars draws in our sky over 32 years. Every couple of years it slows down, loops backwards and carries on, and all those loops add up to this.
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I put 640 metronomes on one platform, each playing its own note, and started them all at once in total chaos. Watch what happens when they all sync in this physics simulation. 馃攰
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Run The Sim retweeted
Bamboo can spend years building roots underground with nothing to show above the soil, and then one day it breaks through and grows almost a metre in a day. If you've been working hard and seeing nothing yet, your roots might be growing too.
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Run The Sim retweeted
If you draw a line between Earth and Venus every few days as they circle the Sun, then keep going for eight years, they draw a five-petalled flower, and when you join up the five places where Venus passes closest to us, they make a perfect five-pointed star. 馃攰
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Run The Sim retweeted
Each of these glowing lines is the path of a real asteroid. The gold ones are the Hildas, more than 7,000 asteroids out past Mars, and every one of them goes around the Sun exactly three times for every two orbits of Jupiter. Because of that rhythm they all end up tracing the same giant triangle, with the Sun in the middle and Jupiter at the top, and they鈥檝e been moving like this for millions of years. They slow down at the corners, where the lines turn deep orange, and speed up along the sides. The blue and pink clouds are the Trojans, two groups of asteroids that share Jupiter鈥檚 orbit, one ahead of it and one behind. The orbits are all real, from NASA鈥檚 asteroid data. #space #astronomy #jupiter #asteroids #physics
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If you draw a line between Earth and Mars every 6 days, starting from Mars's closest approach in 2003, fifteen years of their real orbits weave this seven-petal rose.
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Run The Sim retweeted
Sometimes all it takes is one more try. 鈥˙ut that last one only works because of all the ones before it. 鈥―on't stop at 99.
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The Taj Mahal doesn't have a light show, so I made one, on a full moon night with fountains dancing in the long pool in front of it. Shah Jahan built it as a tomb for his wife Mumtaz Mahal, and almost four hundred years later it might still be the most beautiful building in the world. 馃嚠馃嚦
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A jet sends out sound in rings that spread at about 343 metres per second. As it speeds up, the rings in front get squeezed closer together, and at the speed of sound they pile up into a single wall right at its nose. Once it flies faster than that, the rings fall behind it in a cone, and anyone on the ground hears nothing until that cone sweeps over them, which is the sonic boom. Sound on 馃攰
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A gear with four pens attached. each pen draws a different layer, and the result is this beautiful glowing mandala.
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Run The Sim retweeted
Jupiter has three big moons called Io, Europa and Ganymede, and they're locked in a rhythm 馃獝 Every time Ganymede circles Jupiter once, Europa goes around twice and Io four times. Each time two of them line up, they play a note, and together they make a perfect 3-against-2 beat. The glowing lines between Io and Europa slowly bloom into a rosette. Real NASA/JPL data. #jupiter #space #physics #astronomy #science #satisfying
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Have you ever seen a light and water show in person? This is my own simulated version over Marina Bay, Singapore, with every laser, fountain jet and droplet fired by the orchestra. One of the most beautiful things I鈥檝e ever seen. 馃寖
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Run The Sim retweeted
Math, but make it phonk 馃枻
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