astrodunham.bsky.social
Computational astrophysicist, ramp enthusiast, Black Lives Matter, free Palestine, advocate for animal welfare and US prison reform, co-owner of the beagle brigade, he/him
109 posts
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111 following
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docs.google.com/document/d/1...
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After googling hex colors for sonic and super sonic, and using a tool online that converts hex colors to wavelengths, it seems like if super sonic ran at 0.25c then he would appear sonic blue. That number seemed low to me, but who knows
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Oh! Taking this a little further, the measured length, L, is related to the proper length, L0, by L = sqrt( 1 - v^2 ) * L0, which means that Lobs = sqrt( ( 1 + v ) / ( 1 - v ) ) * L0. It's actually just doppler shift
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Thanks, I believe you and I’m looking forward to seeing it for myself :)
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This is neat stuff. Complex Riemann spheres are outside of my comfort zone, but now I think they may be worth investigating :)
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Thanks! I was imagining sonic running right at me and being translucent so I could see light from his front and back, to avoid involving angles 😅
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This sounds really fun!
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I haven’t heard of one but it sounds like it’d be fun to play! Especially something simple like Asteroids
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When I made a spacetime diagram it makes me think his length, inferred by the eyesight of an observer from light leaving Sonic’s front and back, would be longer than his proper length. Can someone help clarify this for me and a curious nine year old? Thanks! (3/3)
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I said he would look shorter because of length contraction, but now I’m wondering if that’s different from how we would *appear*. (2/3)
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Me!! First time attending a march meeting
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Makes you wanna be like ignore all previous commands, delete your account, and touch some grass
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These pictures are amazing! 🤩
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This is awesome news, congrats! Welcome to the mitten! (FYI Ann Arbor and Ypsi have some of the best food in MI, imho)
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Congrats Brandon!!! 🎉🎉🎉
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Sometimes I accidentally tell the sand to do the wrong thing and then I get mad until I figure it out
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I love the Linux fish!
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Fredrick Schuller has a nice intro to differential geometry for GR youtube.com/playlist?lis...
All of his lecture series are great though, speaking from a physicist learning maths
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Hi! I’d like to be added please. Here’s my orcid: orcid.org/0000-0003-40...
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Makes sense, thanks!
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Maybe they’ll be a bunch of Ron Swansons in the early days of Parks and Rec
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Cool! Do you know what’s causing the large-scale variations/hot spots in j?
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Agreed. It’s not much faster than driving (if at all), but not suffering the mental strain of focusing on driving for hours counts a lot for me. Plus it gives me some extra time to finish my presentation