aladin-lite
celestiary
aladin-lite | celestiary | |
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12 | 4 | |
89 | 42 | |
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9.3 | 8.0 | |
7 days ago | 21 days ago | |
JavaScript | JavaScript | |
GNU General Public License v3.0 only | - |
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aladin-lite
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James Webb & The Two Micron All Sky Survey - J-H-K bands (2MASS color) of Herbig-Haro 211.
2MASS colored
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where can I find a high quality image or images of the entire sky to study?
Aladin (Lite) has a bunch of survey data in various wavelengths and the options to overlay the source names from SIMBAD or GAIA.
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strange google sky pictures pt 1(from ohio)
And I might be worth looking at other sky viewers, such as Aladin Lite or the Legacy Survery viewer, often the images are cleaner for other surveys, e.g. in unWISE vs 2MASS.
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I read that there are high concentrations of interstellar dust and gas near the center of the galaxy that make it difficult to resolve stars. If Earth were orbiting a planet very near to the galactic center, would space appear “hazy” instead of clear and black?
Most of the sky is not full of nebulae, sure, but if anywhere would be dense enough to completely cut off visible light, the galactic center would be that place. And indeed it is! See for yourself - in https://aladin.u-strasbg.fr/AladinLite/ search the "galactic center" and see how it looks in DSS (visible light) 2MASS (near-infrared) and finally WISE (mid-infrared) - as you escape the dust clouds, the sky turns from a dark splotchy patch to a blindingly bright core.
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SgrA* black hole: Why can we see the orbiting stars in IR but not the accretion disk?
The galactic center is invisible in optical due to dust. If you open Aladin Lite ( https://aladin.u-strasbg.fr/AladinLite/ ) and plug in Sagittarius A*, you will find a tiny handful of stars in front of a dense dust cloud. Switching the image source to DECaPS, you can see a faint red glow as the cloud becomes less opaque in very-near-infrared. Moving just a bit further into infrared with 2MASS, you can see the galactic center showing up in the near-mid infrared bands H and K (green/red). By the time you get to proper mid-infrared observatories like WISE, the entire galactic center is a blinding white, saturating every single band.
- The James Webb Space Telescope's 1st target star is in the Big Dipper. Here's where to see it.
- Aladin Lite – explore telescopic imagery of the Universe
- Aladin Lite is one of the greatest online tools available to look at our universe through the eyes of many different telescopes. Here we can scan the entire sky for hidden galaxies, and even decipher information about their stellar populations and evolution.
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32 million light-years way from our home planet
I've always liked this sky atlas site for looking up celestial objects. You can zoom in/ out and look up almost any 'static' object (stars, galaxies, nebulae, clusters, etc). OP's object is NGC 891 which you can directly search.
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i’m so proud of myself!! i found a constellation by myself for the first time! i’m 13 and i’m dreaming of working for nasa and study stars. i found the Ursa Major!! i also saw a shooting star! i’m so happy!!
Check out the Aladin sky atlas. Can pretty much type in any constellation/ star/ nebula/ galaxy, it'l center to it then you can zoom in.
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
What are some alternatives?
ffdeptree - Fast import graph visualizer for Typescript or Javscript projects
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.
React Lifecycle Visualizer - Real-time visualizer for React lifecycle methods
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
drift - Easily add "zoom on hover" functionality to your site's images. Lightweight, no-dependency JavaScript.
Open MCT - A web based mission control framework.
astro-rust - Astronomical algorithms in Rust
stellarium-scripts - My scripts for Stellarium, the planetarium program. Good for studying the orbits of the planets and moons in real-time
soma-fm-player - This is a Vue.js web application for streaming radio stations from Somafm.com. This app uses the public SomaFM JSON channels API endpoint to pull in a list of stations and makes it easy to switch between stations. This app also uses Three.js and the HTML5 Web Audio Context API to sample audio data and create a visualizer effect for the selected station.
yamcs - A framework for mission control
astro-rs - Astronomy utils written in Rust
awesome-space - 🛰️🚀A list of awesome space-related packages and resources maintained by The Orbital Index