Lêer:R_Coronae_Australis_region.jpg
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Oorspronklike lêer (4 000 × 3 899 piksels, lêergrootte: 8,61 MG, MIME-tipe: image/jpeg)
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Opsomming
BeskrywingR Coronae Australis region.jpg |
English: Information from ESO:
"This magnificent view of the region around the star R Coronae Australis was created from images taken with the Wide Field Imager (WFI) at ESO’s La Silla Observatory in Chile. R Coronae Australis lies at the heart of a nearby star-forming region and is surrounded by a delicate bluish reflection nebula embedded in a huge dust cloud. The image reveals surprising new details in this dramatic area of sky. "The star R Coronae Australis lies in one of the nearest and most spectacular star-forming regions. This portrait was taken by the Wide Field Imager (WFI) on the MPG/ESO 2.2-metre telescope at the La Silla Observatory in Chile. The image is a combination of twelve separate pictures taken through red, green and blue filters. "This image shows a section of sky that spans roughly the width of the full Moon. This is equivalent to about four light-years at the distance of the nebula, which is located some 420 light-years away in the small constellation of Corona Australis (the Southern Crown). The complex is named after the star R Coronae Australis, which lies at the centre of the image. It is one of several stars in this region that belong to the class of very young stars that vary in brightness and are still surrounded by the clouds of gas and dust from which they formed. "The intense radiation given off by these hot young stars interacts with the gas surrounding them and is either reflected or re-emitted at a different wavelength. These complex processes, determined by the physics of the interstellar medium and the properties of the stars, are responsible for the magnificent colours of nebulae. The light blue nebulosity seen in this picture is mostly due to the reflection of starlight off small dust particles. The young stars in the R Coronae Australis complex are similar in mass to the Sun and do not emit enough ultraviolet light to ionise a substantial fraction of the surrounding hydrogen. This means that the cloud does not glow with the characteristic red colour seen in many star-forming regions. "The huge dust cloud in which the reflection nebula is embedded is here shown in impressively fine detail. The subtle colours and varied textures of the dust clouds make this image resemble an impressionist painting. A prominent dark lane crosses the image from the centre to the bottom left. Here the visible light emitted by the stars that are forming inside the cloud is completely absorbed by the dust. These objects could only be detected by observing at longer wavelengths, by using a camera that can detect infrared radiation. "R Coronae Australis itself is not visible to the unaided eye, but the tiny, tiara-shaped constellation in which it lies is easily spotted from dark sites due to its proximity on the sky to the larger constellation of Sagittarius and the rich star clouds towards the centre of our own galaxy, the Milky Way." |
Datum | |
Bron | European Southern Observatory |
Outeur | ESO |
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Items portrayed in this file
uitbeelding
copyrighted Engels
30 Junie 2010
Lêergeskiedenis
Klik op die datum/tyd om te sien hoe die lêer destyds gelyk het.
Datum/Tyd | Duimnael | Dimensies | Gebruiker | Opmerking | |
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huidig | 08:27, 8 Julie 2010 | 4 000 × 3 899 (8,61 MG) | Lars Lindberg Christensen | {{Information |Description={{en|1=The nearby star-forming region around the star R Coronae Australis imaged by the Wide Field Imager (WFI) on the MPG/ESO 2.2-metre telescope at ESO’s La Silla Observatory in Chile. This picture, which covers a field of 3 |
Lêergebruik
Die volgende 2 bladsye gebruik dié lêer:
Globale lêergebruik
Die volgende ander wiki's gebruik hierdie lêer:
- Gebruik in arz.wikipedia.org
- Gebruik in ast.wikipedia.org
- Gebruik in bs.wikipedia.org
- Gebruik in en.wikipedia.org
- Corona Australis
- R Coronae Australis
- Wikipedia:Featured pictures/Space/Looking out
- NGC 6729
- Wikipedia:Did you know/Statistics/Monthly DYK pageview leaders/2012
- Talk:R Coronae Australis
- Wikipedia:Featured pictures thumbs/32
- Wikipedia:Recent additions/2012/July
- Template:Did you know nominations/Corona Australis
- Wikipedia:Main Page history/2012 July 11
- User:Sadalsuud/sandbox
- Wikipedia:Featured picture candidates/R Coronae Australis region
- Wikipedia:Featured picture candidates/October-2012
- User talk:Pine/Archive 2
- Wikipedia:Today's featured article/August 2015
- Wikipedia:Picture of the day/January 2014
- Template:POTD/2014-01-21
- Wikipedia:Main Page history/2014 January 21
- User:Megabike/Picture of the day
- User talk:Pine/Archive 4
- User:Randhawaharnir
- Wikipedia:Today's featured article/requests/Corona Borealis and Corona Australis
- Wikipedia:Today's featured article/August 16, 2015
- Wikipedia:Main Page history/2015 August 16
- Gebruik in en.wikiversity.org
- Gebruik in es.wikipedia.org
- Gebruik in et.wikipedia.org
- Gebruik in fa.wikipedia.org
- Gebruik in fr.wikipedia.org
- Gebruik in hi.wikipedia.org
- Gebruik in hu.wikipedia.org
- Gebruik in is.wikipedia.org
- Gebruik in it.wikipedia.org
- Gebruik in it.wikibooks.org
- Gebruik in ja.wikipedia.org
- Gebruik in nn.wikipedia.org
- Gebruik in pt.wikipedia.org
Wys meer globale gebruik van die lêer.
Metadata
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