File:Hubble Friday - Heavy Metal Stars (26829267114).jpg
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DescriptionHubble Friday - Heavy Metal Stars (26829267114).jpg |
Hubble rocks out with heavy metal stars! This 10.5-billion-year-old globular cluster, NGC 6496, is home to heavy-metal stars of a celestial kind! The stars comprising this spectacular spherical cluster are enriched with much higher proportions of metals — elements heavier than hydrogen and helium are curiously known as metals in astronomy — than stars found in similar clusters. A handful of these high-metallicity stars are also variable stars, meaning that their brightness fluctuates over time. NGC 6496 hosts a selection of long-period variables — giant pulsating stars whose brightness can take up to, and even over, a thousand days to change — and short-period eclipsing binaries, which dim when eclipsed by a stellar companion. The nature of the variability of these stars can reveal important information about their mass, radius, luminosity, temperature, composition, and evolution, providing astronomers with measurements that would be difficult or even impossible to obtain through other methods. NGC 6496 was discovered in 1826 by Scottish astronomer James Dunlop. The cluster resides at about 35,000 light-years away in the southern constellation of Scorpius (The Scorpion). Image credit: ESA/Hubble & NASA, Acknowledgement: Judy Schmidt Text credit: European Space Agency Read more: go.nasa.gov/1U2wqGW |
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Source | Hubble Friday - Heavy Metal Stars |
Author | NASA Goddard Space Flight Center from Greenbelt, MD, USA |
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This image was originally posted to Flickr by NASA Goddard Photo and Video at https://flickr.com/photos/24662369@N07/26829267114. It was reviewed on 17 September 2016 by FlickreviewR and was confirmed to be licensed under the terms of the cc-by-2.0. |
17 September 2016
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This file is in the public domain in the United States because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, NASA copyright policy page or JPL Image Use Policy.) | ||
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Credit/Provider | ESA/Hubble & NASA Acknowledgement: Judy Schmidt (Geckzilla) |
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Source | ESA/Hubble |
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Date and time of data generation | 06:00, 30 May 2016 |
Software used | Adobe Photoshop CC 2014 (Windows) |
Unique ID of original document | xmp.did:5b9ff2a9-5a8f-9343-b06e-afa3c9dec1b5 |
Keywords | NGC 6496 |
Contact information |
Karl-Schwarzschild-Strasse 2 Garching bei München, , D-85748 Germany |
IIM version | 4 |