File:Trifid, M20, NGC 6514 (noao-m20).jpg
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![File:Trifid, M20, NGC 6514 (noao-m20).jpg](http://upload.wikimedia.org/wikipedia/commons/thumb/d/d1/Trifid%2C_M20%2C_NGC_6514_%28noao-m20%29.jpg/600px-Trifid%2C_M20%2C_NGC_6514_%28noao-m20%29.jpg)
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Summary
DescriptionTrifid, M20, NGC 6514 (noao-m20).jpg |
English: The Trifid Nebula, M20 or NGC6514, is a familiar sight and an excellent example of an emission and reflection nebula. The red emission nebula contains a bright blue star cluster near its center: it glows red because the ultraviolet light of the stars ionizes the hydrogen gas, which then recombines and emits the characteristic red hydrogen-alpha light. Further out, when the radiation from these hot young stars becomes too weak to ionize hydrogen, the gas and dust instead glows by reflecting the original blue light. M20 is in the constellation of Sagittarius, at a poorly-known distance somewhere between 2200 and 7600 light-years. We also have a deep black and white image from the KPNO Mayall 4-m telescope. M20 is quite close on the sky to the open cluster M21, as shown in this lower resolution but wider field picture. |
Date | 30 June 2020, 21:34:00 (upload date) |
Source | Trifid, M20, NGC 6514 |
Author | Todd Boroson/NOIRLab/NSF/AURA |
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This media was created by the National Optical-Infrared Astronomy Research Laboratory (NOIRLab).
Their website states: "Unless specifically noted, the images, videos, and music distributed on the public NOIRLab website, along with the texts of press releases, announcements, images of the week and captions; are licensed under a Creative Commons Attribution 4.0 International License, and may on a non-exclusive basis be reproduced without fee provided the credit is clear and visible." To the uploader: You must provide a link (URL) to the original file and the authorship information if available. |
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Captions
The Trifid Nebula, M20 or NGC6514, is a familiar sight and an excellent example of an emission and reflection nebula.
Items portrayed in this file
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image/jpeg
2,048 pixel
2,048 pixel
2,066,261 byte
397e92d8572be2aadea11dd7e180d4a0bfe3c512
30 June 2020
1zst69gbbjxy6rxlfs6i34t5gx5sp8bh8k5eqursw6gnhvwm6o
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 19:02, 17 September 2023 | ![]() | 2,048 × 2,048 (1.97 MB) | OptimusPrimeBot | #Spacemedia - Upload of https://noirlab.edu/public/media/archives/images/large/noao-m20.jpg via Commons:Spacemedia |
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Credit/Provider | Todd Boroson/NOIRLab/NSF/AURA |
Source | NSF's NOIRLab |
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Date and time of data generation | 21:34, 30 June 2020 |
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Contact information |
950 North Cherry Ave. Tucson, AZ, 85719 USA |
IIM version | 4 |