torsdag 7. desember 2023

Space - Noe nytt hver eneste dag - Nå: Ekstremt fjern galakse - Space.com

 Space.com

James Webb Space Telescope pierces through dust to find an ancient ghostly galaxy

a blurry, pixelated red and green splotch dissipates outward to black.

Galaxy AzTECC71 as imaged by the James Webb Space Telescope. (Image credit: J. McKinney/M. Franco/C. Casey/The University of Texas at Austin)

This image of a galaxy from the early universe is hardly what you'd call dazzling. 

You are looking at a very blurry, highly dust-obscured resident of the cosmos whose name is only a string of numbers and letters. It even sits  at a distance so far from Earth that it slips in and out of the watchful eyes of various telescopes. The image, captured by the powerful James Webb Space Telescope, spotlights galaxy AzTECC71 — but what's striking here is that we're seeing AzTECC71the way it was just 900 million years after the Big Bang. That's when the universe was turning on its very first stars, absolute eons before our solar system was born.

The James Webb Space Telescope's view of this galaxy as a hazy speck of light is a far cry from many other glorious images of galaxies and galaxy clusters in its repertoire. However, even this smudge holds important lessons for our understanding of the early universe.


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