Fichier:Potw1503a.tif
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Description
| Description |
English: Dust filaments of NGC 4217
These tentacle-like filaments are visible in the Hubble image only because the contrast with their surroundings is so high. This implies that the structures are denser than their surroundings. The image shows dozens of dust structures some of which reach as far as 7000 light-years away from the central plane. Typically the structures have a length of about 1000 light-years and are about 400 light-years in width. Some of the dust filaments are round or irregular clouds, others are vertical columns, looplike structures or vertical cones. These structures can help astronomers to identify the mechanisms responsible for the ejection of gas and dust from the galactic plane of spiral galaxies and reveal information on the transport of the interstellar medium to large distances away from galactic discs. The properties of the observed dust structures in NGC 4217 suggest that the gas and dust was driven out of the midplane of the galaxy by powerful stellar winds resulting from supernovae — explosions that mark the deaths of massive stars. This image was entered into the Hubble Hidden Treasures competition by contestant Ralf Schoofs. Credit: Credit: ESA/Hubble & NASA Acknowledgement: R. Schoofs
About the Object
Name: NGC 4217
Type: • Local Universe : Galaxy : Type : Spiral
• Local Universe : Galaxy : Component : Disk
• Local Universe : Galaxy : Component : Dust Lane
Distance: 60 million light years
Constellation: Canes Venatici
Colours & filters Band Wavelength Telescope Infrared I 814 nm Hubble Space Telescope WFPC2 Optical V 555 nm Hubble Space Telescope WFPC2 Optical B 450 nm Hubble Space Telescope WFPC2. |
| Date | |
| Source | http://www.spacetelescope.org/images/potw1503a/ http://www.spacetelescope.org/static/archives/images/original/potw1503a.tif |
| Auteur |
Credit: NASA & ESA Acknowledgement: R. Schoofs |
Conditions d’utilisation
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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:
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| Date et heure | Vignette | Dimensions | Utilisateur | Commentaire | |
|---|---|---|---|---|---|
| actuel | 19 janvier 2015 à 13:17 |  | 1 079 × 1 093, 2 pages (2,22 Mio) | Fabian RRRR | =={{int:filedesc}}== {{Information |description={{en|1=''Dust filaments of NGC 4217 In this image the NASA/ESA Hubble Space Telescope takes a close look at the spiral galaxy NGC 4217, 60 million light-years away. The galaxy is seen almost perfectly e... |
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