celestiary
scale_of_the_universe
celestiary | scale_of_the_universe | |
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4 | 16 | |
42 | 45 | |
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8.0 | 0.0 | |
13 days ago | 3 months ago | |
JavaScript | TypeScript | |
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celestiary
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Mission to reach and operate at the focal region of the solar gravitational lens
hmm.. right.. if the angle of deflection is low and the star is close enough that its light and deflected light show up very close together. My intuition is this is not the case... remember Eddington's test of relativity was for deflection of starlight around our Sun. We're really close, yet it was observable with the moon obscuring the main sunlight.
the article[1] says "For light grazing the surface of the sun, the approximate angular deflection is roughly 1.75 arcseconds." So, what, we take the arcsin of 1.75 arcseconds to get the apparent divergence ratio, and multiply that by distance to stars? As long as that value is larger than the aperture of your camera, then you don't get competing light? Or maybe you'd need something like the TESS satellite, where you have a screen specially created to only allow certain beam transits into your detector.
I've worked with a nearest 10k stars database (https://celestiary.github.io/#sun) and the edge of that is about 2k light years away. So very roughly, let's say there's 1/8th of those in a certain direction... so you get.. what? some 2k sample points towards some distant object? But really most of them wouldn't deflect that object's light towards Earth, but usually over or undershoot.
Don't really know how to put these together quickly, but is giving me some good food for thought!
[1]https://en.wikipedia.org/wiki/Eddington_experiment
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Stellarium Astronomy Software
Thanks! Hmm.. not sure about that. I'm trying to jam it all around but can't get it to lock like that. If you can repro I'd appreciate a bug report! https://github.com/celestiary/web/issues
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Show HN: I rebuilt the flash app Scale of the Universe in WebGL
My own webgl port of Celestia, which allows zoom-out from Earth to the scale of nearest 10k stars:
https://celestiary.github.io/
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Open Source Mission Control Software from NASA
Hmm, the demo has a little "live video" window of a rover's view from the Moon's surface. This seems like a good integration point for a web-based space simulator. I will be doing just this!
https://github.com/pablo-mayrgundter/celestiary/issues/19
scale_of_the_universe
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My Friends and I made a Website showcasing The Scale of the Universe: From Quantum Foam to the Edges of the Observable Universe, Our World is Massive!
Thanks for the kudos! Here is the GitHub link from a previous version for a technical look at how the zooming was achieved. It's been a pretty big challenge to make this work on low-end devices, but we're happy with the results.
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Objects in space to scale in size, rotation speed, and tilt.
This website has been around for about 10 years and its still the best way to comprehend the size of everything big and small https://www.htwins.net/scale2/
- Have you ever contemplated how all complex systems are derived from a series of simpler systems?
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20 Awesome Website You Didn't Know About
✨ 12. Scale of the Universe 2 This will allow you to explore the size and scale of things in the universe.
- ELI5: James Webb Space Telescope [Megathread]
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The pillars of creation.... this never ceases to amaze me!
Found it : https://www.htwins.net/scale2/
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Look at how small we are space is huge
Want to see a really good scale website. Check this one out https://www.htwins.net/scale2/
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why do black holes increase in size if the singularity has infinite density?
For a fun visualization of this, check out Scale of the Universe and start zooming in. You will see that there is a MASSIVE amount of space between a nucleus and its electron shell, for example.
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Mass of RBS 2043 -- Supermassive black hole laying at the galactical centre of the Phoenix Cluster (=20 billion solar mass)
Here is a little size scale interactive thing which demonstrates this: https://www.htwins.net/scale2/
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Ask HN: Teach Me Something New
for a neat visualization of this, https://www.htwins.net/scale2/ — it’s a bit old now, so to view it on mobile the app is pretty much required. i can’t remember exactly what i paid for it on the app store, but i know it’s been worth the few dollars
What are some alternatives?
stellarium - Stellarium is a free GPL software which renders realistic skies in real time with OpenGL. It is available for Linux/Unix, Windows and macOS. With Stellarium, you really see what you can see with your eyes, binoculars or a small telescope.
github-statistics - GitHub statistics
THREE.js-PathTracing-Renderer - Real-time PathTracing with global illumination and progressive rendering, all on top of the Three.js WebGL framework. Click here for Live Demo: https://erichlof.github.io/THREE.js-PathTracing-Renderer/Geometry_Showcase.html
Open MCT - A web based mission control framework.
aladin-lite - An astronomical HiPS visualizer in the browser
stellarium-scripts - My scripts for Stellarium, the planetarium program. Good for studying the orbits of the planets and moons in real-time
yamcs - A framework for mission control
awesome-space - 🛰️🚀A list of awesome space-related packages and resources maintained by The Orbital Index
julia-set-with-shaders - Julia set render with GLSL shaders and P5.js library
mglt - Exploration of the idea of a Multiple Gravitational Lens Telescope
downtoearth - Visualize astronomical scales and more by using your own geographical intuition.
three-noise - Simple gradient noise library for use with Three.js. Now with fBm!