Lêer:A youthful cluster.jpg
Oorspronklike lêer (3 934 × 2 315 piksels, lêergrootte: 6,13 MG, MIME-tipe: image/jpeg)
Hierdie lêer kom vanaf Wikimedia Commons en kan ook in ander projekte gebruik word. Die beskrywing op die lêer se inligtingsblad word hieronder weergegee.
Opsomming
BeskrywingA youthful cluster.jpg |
English: Shown here in a new image taken with the Advanced Camera for Surveys (ACS) on board the NASA/ESA Hubble Space Telescope, is the globular cluster NGC 1783. This is one of the biggest globular clusters in the Large Magellanic Cloud, a satellite galaxy of our own galaxy, the Milky Way, in the southern hemisphere constellation of Dorado.
First observed by John Herschel in 1835, NGC 1783 is nearly 160 000 light-years from Earth, and has a mass around 170 000 times that of the Sun. Globular clusters are dense collections of stars held together by their own gravity, which orbit around galaxies like satellites. The image clearly shows the symmetrical shape of NGC 1783 and the concentration of stars towards the centre, both typical features of globular clusters. By measuring the colour and brightness of individual stars, astronomers can deduce an overall age for a cluster and a picture of its star formation history. NGC 1783 is thought to be under one and a half billion years old — which is very young for globular clusters, which are typically several billion years old. During that time, it is thought to have undergone at least two periods of star formation, separated by 50 to 100 million years. This ebb and flow of star-forming activity is an indicator of how much gas is available for star formation at any one time. When the most massive stars created in the first burst of formation explode as supernovae they blow away the gas needed to form further stars, but the gas reservoir can later be replenished by less massive stars which last longer and shed their gas less violently. After this gas flows to the dense central regions of the star cluster, a second phase of star formation can take place and once again the short-lived massive stars blow away any leftover gas. This cycle can continue a few times, at which time the remaining gas reservoir is thought to be too small to form any new stars. A version of this image was entered into the Hubble's Hidden Treasures image processing competition by contestant Judy Schmidt. |
Datum | |
Bron | http://www.spacetelescope.org/images/potw1534a/ |
Outeur |
ESA/Hubble & NASA Acknowledgement: Judy Schmidt (geckzilla.com) |
Lisensiëring
ESA/Hubble images, videos and web texts are released by the ESA under the Creative Commons Attribution 4.0 International license and may on a non-exclusive basis be reproduced without fee provided they are clearly and visibly credited. Detailed conditions are below; see the ESA copyright statement for full information. For images created by NASA or on the hubblesite.org website, or for ESA/Hubble images on the esahubble.org site before 2009, use the {{PD-Hubble}} tag.
Conditions:
Notes:
|
- U is vry:
- om te deel – die werk kopieer, versprei en deurgee
- om te hermeng – om die werk aan te pas
- Onder die volgende voorwaardes:
- naamsvermelding – U moet die nodige krediet gee, 'n skakel na die lisensie verskaf en aandui of daar veranderinge aangebring is. U mag dit op enige redelike manier doen, maar nie op enige manier wat daarop dui dat die lisensiegewer u of u gebruik onderskryf nie.
Items portrayed in this file
uitbeelding
copyrighted Engels
24 Augustus 2015
MIME type Engels
image/jpeg
checksum Engels
dd523ee240511f0c5875841b2bca06698e991a55
data size Engels
6 431 556 greep
height Engels
2 315 pieksel
width Engels
3 934 pieksel
Lêergeskiedenis
Klik op die datum/tyd om te sien hoe die lêer destyds gelyk het.
Datum/Tyd | Duimnael | Dimensies | Gebruiker | Opmerking | |
---|---|---|---|---|---|
huidig | 11:18, 31 Augustus 2015 | 3 934 × 2 315 (6,13 MG) | Szczureq | larger | |
08:48, 24 Augustus 2015 | 1 280 × 753 (476 KG) | Jmencisom | User created page with UploadWizard |
Lêergebruik
Die volgende bladsy gebruik dié lêer:
Globale lêergebruik
Die volgende ander wiki's gebruik hierdie lêer:
- Gebruik in arz.wikipedia.org
- Gebruik in el.wikipedia.org
- Gebruik in en.wikipedia.org
- Gebruik in fa.wikipedia.org
- Gebruik in it.wikibooks.org
- Gebruik in ko.wikipedia.org
- Gebruik in pl.wikipedia.org
- Gebruik in pnb.wikipedia.org
- Gebruik in ur.wikipedia.org
Metadata
Die lêer bevat aanvullende inligting wat moontlik deur 'n digitale kamera of skandeerder bygevoeg is.
As die lêer verander is, sal sekere inligting dalk nie meer ooreenkom met dié van die gewysigde lêer nie.
Krediet/Verskaffer | ESA/Hubble & NASA Acknowledgement: Judy Schmidt (geckzilla.com) |
---|---|
Bron | ESA/Hubble |
Kort titel |
|
Beeldtitel |
|
Gebruiksvoorwaardes |
|
Gegewens opgestel op | 10:00, 24 Augustus 2015 |
Sagteware gebruik | Adobe Photoshop CC 2014 (Windows) |
Unieke ID van die oorspronklike dokument | xmp.did:bed61354-7e0b-1d46-b5dc-280a80931d43 |
Sleutelwoorde | NGC 1783 |
Kontak inligting |
http://www.spacetelescope.org/ Karl-Schwarzschild-Strasse 2 Garching bei München, , D-85748 Germany |
IIM-weergawe | 4 |