File:IRAS 19114+0002.png
IRAS_19114+0002.png (573 × 493 pixels, file size: 1.23 MB, MIME type: image/png)
Captions
Captions
Summary[edit]
| Description |
Yet another bright preplanetary nebula. The star, HD 179821 actually has a Wikipedia page, which I didn't actually know about until now. Apparently, it's among the largest stars we know of. The article raises some slight confusion for me because it states that the star is surrounded by a "reflection nebula," but I assume it means this in the sense that planetary nebulae are reflection nebulae anyway. Like many of these nebulae, it still hasn't been confirmed to be a preplanetary nebula, but I guess I'll just let you decide. I mean, it definitely looks like it, but I don't know what exact things are required for an object to meet the qualifications of a preplanetary nebula. The image itself is not that impressive in terms of colour (my current theme), but I think the nebula structure is quite nice and I couldn't ignore it. Also, to clarify, that diagonal line going from the top right to bottom left is not part of the nebula, it's an artefact. I'm never sure exactly how much I should remove from the image; it's subtle enough that I thought it would be fine to leave it. Additionally, I'm not sure if these IRAS identifiers can be used to describe the nebulosity or if it's solely the identifier of the star. I assume its the whole object, star and nebulosity included. It probably doesn't matter at all, but I don't know whether I should just title it "HD 179821" since, while certainly the identifier of the star, it's easier to remember (for me at least) and just seems like a simpler ID. Better than coordinates, anyway. This image was constructed using data collected for proposal 6737: Imaging Reflection Nebulosity in Three Post-AGB Objects Red: hst_06737_02_wfpc2_f547m_pc Green: pseudo Blue: hst_06737_02_wfpc2_f410m_pc |
| Date | |
| Source | IRAS 19114+0002 |
| Author | solomon from USA |
Licensing[edit]
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This image was originally posted to Flickr by theantarcticsun at https://flickr.com/photos/131716393@N07/44711628055 (archive). It was reviewed on 28 September 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 14:45, 28 September 2019 | | 573 × 493 (1.23 MB) | Fabian RRRR (talk | contribs) | =={{int:filedesc}}== {{Information |Description=Yet another bright preplanetary nebula. The star, HD 179821 actually has a [https://en.wikipedia.org/wiki/HD_179821 Wikipedia page], which I didn't actually know about until now. Apparently, it's among the largest stars we know of. The article raises some slight confusion for me because it states that the star is surrounded by a "reflection nebula," but I assume it means this in the sense that planetary nebulae are reflection nebulae anyway. Lik... |
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