File:Galactic Close-Up.jpg

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Summary

Description
English: This image shows a close-up portrait of the magnificent spiral galaxy NGC 4603, which lies over 100 million light-years away in the constellation of Centaurus (The Centaur). Bright bands of blue young stars make up the arms of this galaxy, which wind lazily outwards from the luminous core. The intricate red-brown filaments threading through the spiral arms are known as dust lanes, and consist of dense clouds of dust which obscure the diffuse starlight from the galaxy. This galaxy is a familiar subject for Hubble. In the last years of the twentieth century, NGC 4063 was keenly and closely watched for signs of a peculiar class of stars known as Cepheid variables. These stars have a luminosity closely tied to the period with which they darken and brighten, allowing astronomers to accurately measure how far they are from Earth. Distance measurements from Cepheid variables are key to measuring the furthest distances in the Universe, and were one of the factors used by Georges Lemaître and Edwin Hubble to show that the Universe is expanding.
Date
Source https://esahubble.org/images/potw2116a/
Author ESA/Hubble & NASA, J. Maund

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This file is licensed under the Creative Commons Attribution 4.0 International license.
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depicts

NGC 4603

inception

19 April 2021

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current18:16, 26 April 2021Thumbnail for version as of 18:16, 26 April 2021985 × 987 (557 KB)PandreveUploaded a work by ESA/Hubble & NASA, J. Maund from https://esahubble.org/images/potw2116a/ with UploadWizard
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