File:A Waterfall of Stars (50614104358).jpg

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The galaxy UGCA 193, seen here by the NASA/ESA Hubble Space Telescope, is a galaxy in the constellation of Sextans (The Sextant). Looking rather like a waterfall, UGCA 193 appears to host many young stars, especially in its lower portion, creating a striking blue haze and the sense that the stars are falling from “above”.

The blue colour of UGCA 193 indicates the stars that we see are hot — some with temperatures exceeding 6 times that of our Sun. We know that cooler stars appear to our eyes more red, and hotter stars appear more blue. As the mass and surface temperature of a star, and therefore its colour, are linked, heavier stars are able to “burn” at higher temperatures resulting in a blue glow from their surface.

Credit: ESA/Hubble & NASA, R. Tully

Acknowledgement: Gagandeep Anand
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Source A Waterfall of Stars
Author Hubble ESA

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This image was originally posted to Flickr by Hubble Space Telescope / ESA at https://flickr.com/photos/51268976@N08/50614104358. It was reviewed on 7 December 2020 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0.

7 December 2020

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Date/TimeThumbnailDimensionsUserComment
current12:23, 7 December 2020Thumbnail for version as of 12:23, 7 December 20201,280 × 1,310 (148 KB)Eyes Roger (talk | contribs)Transferred from Flickr via #flickr2commons

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