File originale (3 855 × 3 831 pixel, dimensione del file: 5,48 MB, tipo MIME: image/jpeg)
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| Descrizione |
This image from the Advanced Camera for Surveys aboard the NASA/ESA Hubble Space Telescope highlights the large and bright elliptical galaxy called ESO 306-17 in the southern sky. In this image, it appears that ESO 306-17 is surrounded by other galaxies but the bright galaxies at bottom left are thought to be in the foreground, not at the same distance in the sky. In reality, ESO 306-17 lies fairly abandoned in an enormous sea of dark matter and hot gas. Researchers are also using this image to search for nearby ultra-compact dwarf galaxies. Ultra-compact dwarfs are mini versions of dwarf galaxies that have been left with only their core due to interaction with larger, more powerful galaxies. Most ultra-compact dwarfs discovered to date are located near giant elliptical galaxies in large clusters of galaxies, so it will be interesting to see if researchers find similar objects in fossil groups. |
| Data | (released) |
| Fonte | |
| Autore | NASA, ESA and Michael West (ESO) |
Licenza
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This file is in the public domain because it was created by NASA and ESA. NASA Hubble material (and ESA Hubble material prior to 2009) is copyright-free and may be freely used as in the public domain without fee, on the condition that only NASA, STScI, and/or ESA is credited as the source of the material. This license does not apply if ESA material created after 2008 or source material from other organizations is in use.
The material was created for NASA by Space Telescope Science Institute under Contract NAS5-26555, or for ESA by the Hubble European Space Agency Information Centre. Copyright statement at hubblesite.org or 2008 copyright statement at spacetelescope.org. For material created by the European Space Agency on the spacetelescope.org site since 2009, use the {{ESA-Hubble}} tag. |
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| Data/Ora | Miniatura | Dimensioni | Utente | Commento | |
|---|---|---|---|---|---|
| attuale | 13:54, 8 mar 2010 | | 3 855 × 3 831 (5,48 MB) | Tryphon | Better quality, from http://www.spacetelescope.org/images/html/heic1004a.html (http://www.spacetelescope.org/images/large/heic1004a.jpg). |
| 15:29, 6 mar 2010 |  | 3 855 × 3 831 (1,18 MB) | File Upload Bot (Magnus Manske) | {{Information |Description=View a video clip zoom in on galaxy ESO 306-17 here: [http://www.flickr.com/photos/gsfc/4409589832/ www.flickr.com/photos/gsfc/4409589832/] This image from the Advanced Camera for Surveys aboard the NASA/ESA Hubble Space Teles |
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