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Cake day: October 8th, 2025

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  • Pedantically, I think you could call muon tomography an antimatter imaging method. It doesnt explicitly use antimatter as a probe, but you do often measure products of antimatter decay or decay products that are antimatter themselves when doing it (depending on how much fidelity you need on the structure being imaged). I say pedantically because I assume you meant medical imaging methods and muon tomography doesnt have medical applications afaik


  • Looks delicious! I absolutely love chili as a vehicle to use ingredients I need to get out of my fridge/pantry. I made a white chili this weekend with miso paste; adding red miso to beef chili is so good that I consider it a core chili ingredient, but I dont think light miso in white chili worked that well. Other main ingredients were chicken thigh, bacon, white beans, poblanos, cowhorns, chipotles, serranos, tomatoes and cumin




  • The absolute distance is strictly irrelevant given this is a relative comparison between two magnetic fields. The one that is 6 orders of magnitude higher will maintain that 6 orders of magnitude difference exactly the same at a distance of 100m as it will at a distance of 100au. That means that the stronger field will maintain the minimum strength required to “guide” particles towards the dipole at a greater distance than the weaker magnetic field would. I feel you if you’re only trying to argue that it would still need to be within some neighborhood of some star to produce an aurora, but your posts read like you’re claiming 6 orders of magnitude on the magnetic field makes no difference on how close that object would need to be to produce an aurora, which is flatly incorrect.


  • I dont think you’re quite understanding how big 6 orders of magnitude is. 4000000/r2 still falls off way slower than 1/r2.

    Also the funnel diagram of the earth’s magnetic field you’re referring to is a near field effect. In the far field regime the only field components that stay strong enough to be relevant are those parallel to the axis of the dipole; a dipole is functionally identical to a bar magnet if you’re measuring it from far enough away. If my understanding of solar wind is correct and the aurora refers to an interaction that occurs between the earth’s magnetic field and particles near the sun, we’re definitely in the far field regime