File:Caldwell_53_(50291843072).jpg
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DescriptionCaldwell 53 (50291843072).jpg |
Lacking spiral arms but boasting a galactic bulge and prominent disk, lenticular galaxies like Caldwell 53 (NGC 3115) are intermediates between the more familiar spiral and elliptical galaxies. This galaxy, like most of its kind, hosts an elderly stellar population and has used up nearly all of its star-forming material. Appearing edge-on to us, the galaxy is located 32 million light-years from Earth in the constellation Sextans and has an apparent magnitude of 9.9. Discovered by William Herschel in 1787, it is most easily observed during early spring in the Northern Hemisphere and autumn in the Southern Hemisphere. As one of the brighter galaxies, Caldwell 53 can be easily seen in a small telescope, which will display the galaxy’s spindle-like form and bright central region. Caldwell 53 is perhaps most notable for the supermassive black hole that lurks at its center. One of the ways astronomers are able to estimate the mass of a black hole is by observing the temperature of the hot gas being dragged toward it. Using this method, astronomers estimate that the black hole within Caldwell 53 has a mass roughly one billion times the mass of our Sun. This estimation means that Caldwell 53 hosts the closest billion-solar-mass black hole to Earth. This image of Caldwell 53 is a composite of observations taken by Hubble’s Advanced Camera for Surveys at infrared and visible wavelengths. Scientists used information gathered from these observations to constrain the temperature and density of the gas that surrounds the supermassive black hole at the center of the galaxy. Credit: NASA, ESA, and J. Erwin (University of Alabama); Processing: Gladys Kober (NASA/Catholic University of America) For Hubble's Caldwell catalog website and information on how to find these objects in the night sky, visit: <a href="https://www.nasa.gov/content/goddard/hubble-s-caldwell-catalog" rel="noreferrer nofollow">www.nasa.gov/content/goddard/hubble-s-caldwell-catalog</a> |
Date | |
Source | Caldwell 53 |
Author | NASA Hubble Space Telescope |
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This image was originally posted to Flickr by NASA Hubble at https://flickr.com/photos/144614754@N02/50291843072. It was reviewed on 16 December 2020 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
16 December 2020
Items portrayed in this file
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14 August 2020
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20,737,523 byte
8,163 pixel
13,488 pixel
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 17:43, 16 December 2020 | 13,488 × 8,163 (19.78 MB) | Szczureq | Transferred from Flickr via #flickr2commons |
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Width | 16,500 px |
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Height | 18,000 px |
Bits per component | 16 |
Compression scheme | Uncompressed |
Pixel composition | Black and white (Black is 0) |
Orientation | Normal |
Number of components | 1 |
Horizontal resolution | 72 dpi |
Vertical resolution | 72 dpi |
Data arrangement | chunky format |
Software used | Adobe Photoshop 21.2 (Macintosh) |
File change date and time | 10:44, 14 August 2020 |
Color space | sRGB |
Date and time of digitizing | 13:58, 30 October 2018 |
Date metadata was last modified | 06:44, 14 August 2020 |
Unique ID of original document | xmp.did:dd5e9f51-da7c-4505-8396-54ae15e6b69f |