File:Caldwell 56 (50324201148).jpg
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Summary
editDescriptionCaldwell 56 (50324201148).jpg |
This serene view captures a portion of the planetary nebula NGC 246, also known as Caldwell 56. Planetary nebulae are named such because when they were first observed through early telescopes, they resembled planets. However, a planetary nebula is actually the final stage in the evolution of a star that is similar to our Sun. As the star reaches the end of its life, pulsations and strong stellar winds eject the star’s envelopes of gas. The hot, compact core of the star emits intense radiation, causing the gas to glow for a few tens of thousands of years before the nebula dissolves, leaving behind a white dwarf like the one at the center of Caldwell 56. The image above was captured by Hubble’s Wide Field and Planetary Camera 2. It provides a detailed look at the structure of Caldwell 56 and its central star. These observations, and subsequent ones, were taken to better understand how the wispy filaments in a planetary nebula change over time. Caldwell 56 is located approximately 1,600 light-years away in the constellation Cetus. It has an apparent magnitude of 8 and appears as a faint, circular glow through moderately sized telescopes. A few stars appear superimposed on the nebula. The best time to observe Caldwell 56 is during the Northern Hemisphere’s autumn and the Southern Hemisphere’s spring. It was discovered by the English astronomer William Herschel in 1785. Credit: NASA, ESA, J. Westphal (California Institute of Technology), and K. Werner (Eberhard Karls Universitat); 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 56 |
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@N02/50324201148. 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
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current | 17:43, 16 December 2020 | 1,488 × 1,501 (862 KB) | Szczureq (talk | contribs) | Transferred from Flickr via #flickr2commons |
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Orientation | Normal |
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Horizontal resolution | 72 dpi |
Vertical resolution | 72 dpi |
Software used | Adobe Photoshop 21.2 (Macintosh) |
File change date and time | 13:39, 1 September 2020 |
Y and C positioning | Centered |
Exif version | 2.32 |
Date and time of digitizing | 10:22, 22 October 2018 |
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Supported Flashpix version | 1 |
Color space | sRGB |
Bits per component |
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Compression scheme | Uncompressed |
Height | 1,501 px |
Width | 1,488 px |
Pixel composition | RGB |
Number of components | 3 |
Type of media | Observation |
Date metadata was last modified | 09:39, 1 September 2020 |
Unique ID of original document | xmp.did:d0aa9dce-280a-4f5d-86e4-102e155ec27e |