James Webb Telescope: NASA's First 7 Images Explained
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- čas přidán 8. 06. 2024
- The James Webb Space Telescope team has released the first science-quality images from the new telescope. Let's break them down.
Do not forget to subscribe - / @spacehubb
Useful links, sources and additional info:
Gallery - www.space.com/james-webb-spac...
JSWT Website - www.jwst.nasa.gov/
HiRes images - webbtelescope.org/contents/ne...
Stephan’s Quintet - www.nasa.gov/image-feature/go...
Carina Nebula - www.nasa.gov/image-feature/go...
First image - www.nasa.gov/press-release/pr...
WASP 96b - www.nasa.gov/image-feature/go...
Southern Ring planetary nebula - www.nasa.gov/image-feature/go...
Jupiter - www.space.com/james-webb-spac...
Video sources - drive.google.com/file/d/1W51t...
Music - / asperxmusic - Věda a technologie
Which JSWT image impressed you the most?
Blackhole one.
Each and every photo did and your explaination of it was really well 🔥🔥
The universe's just so exciting and wonderful to think about and you explained it perfectly, you just earned a sub!
Calling them "Hot young stars" caught me off guard a bit
Like heavenly bodies in nightskies and heavenly bodies on the beach.
CZcams algorithm are working to spread this channel
We hope so
Thanks for explaining. Now i understand what the fuss is all about. And its incredible
At your service!
To " Space Hub " : Sir, how can astronomers tell just how far [ 13 billion years ] away from us these objects are , from a photo ? Understand, I'm not an expert at math, but if you can answer in general terms, please. -----------------MJL, 75 y/o
There are many methods sir.
First of all, it's not exactly about photo. It is about scientific data that the telescope gives along with the photo. Wavelengths, redshift, etc. Having them, you can use several methods.
1. Redshift - 'Red shift' is a key concept for astronomers. Specifically, the distance to this galaxy is most likely calculated this way. The term can be understood literally - the wavelength of the light is stretched, so the light is seen as 'shifted' towards the red part of the spectrum. Light behaves like a wave, so light from a luminous object undergoes a Doppler-like shift if the source is moving relative to us. Ever since 1929, when Edwin Hubble discovered that the Universe is expanding, we have known that most other galaxies are moving away from us. Light from these galaxies is shifted to longer (and this means redder) wavelengths - in other words, it is 'red-shifted'. The red shift of a distant galaxy or quasar is easily measured by comparing its spectrum with a reference laboratory spectrum. Atomic emission and absorption lines occur at well-known wavelengths. By measuring the location of these lines in astronomical spectra, astronomers can determine the red shift of the receding sources. And with it, calculate the distance.
2. Standard candles - bright objects that, from other analyses, are known to have a fixed absolute luminosity (brightness). Since, according to elementary geometry, light flux falls off as the square of the distance, by measuring the actual brightness observed on earth using a powerful telescope, astronomers can calculate the distance to the object. If that object is, say, an object in a distant galaxy, then this serves as an approximate measurement of the distance to that galaxy.
3. Type Ia Supernovas - These occur in a binary star system when a white dwarf star starts to attract matter from a larger red dwarf star. As the white dwarf gains more and more matter, eventually the star becomes unstable and undergoes a runaway nuclear fusion reaction, producing an extremely bright event that often may briefly outshine the entire galaxy that the supernova is located in. Because this process is well understood, and can occur only within a very narrow range of total mass, the absolute luminosity Type Ia supernovas is very predictable, varying only slightly according to the shape of the supernova's rise-fall curve.