Datei:Jets and explosions in NGC 7793.jpg
Größe dieser Vorschau: 620 × 599 Pixel. Weitere Auflösungen: 248 × 240 Pixel | 496 × 480 Pixel | 794 × 768 Pixel | 1.059 × 1.024 Pixel | 2.118 × 2.048 Pixel | 4.113 × 3.977 Pixel.
Originaldatei (4.113 × 3.977 Pixel, Dateigröße: 14,79 MB, MIME-Typ: image/jpeg)
Beschreibung
| Beschreibung |
English: This new image from the NASA/ESA Hubble Space Telescope shows NGC 7793, a spiral galaxy in the constellation of Sculptor some 13 million light-years away from Earth. NGC 7793 is one of the brightest galaxies in the Sculptor Group, and one of the closest groups of galaxies to the Local Group — the group of galaxies containing our galaxy, the Milky Way and the Magellanic Clouds.
The image shows NGC 7793’s spiral arms and small central bulge. Unlike some other spirals, NGC 7793 doesn’t have a very pronounced spiral structure, and its shape is further muddled by the mottled pattern of dark dust that stretches across the frame. The occasional burst of bright pink can be seen in the galaxy, highlighting stellar nurseries containing newly-forming baby stars. Although it may look serene and beautiful from our perspective, this galaxy is actually a very dramatic and violent place. Astronomers have discovered a powerful microquasar within NGC 7793 — a system containing a black hole actively feeding on material from a companion star. While many full-sized quasars are known at the cores of other galaxies, it is unusual to find a quasar in a galaxy’s disc rather than at its centre. Micro-quasars are almost like scale models — they allow astronomers to study quasars in detail. As material falls inwards towards this black hole, it creates a swirling disc around it. Some of the infalling gas is propelled violently outwards at extremely high speeds, creating jets streaking out into space in opposite directions. In the case of NGC 7793, these jets are incredibly powerful, and are in the process of creating an expanding bubble of hot gas some 1000 light-years across. |
| Datum | |
| Quelle | http://www.spacetelescope.org/images/potw1438a/ |
| Urheber |
ESA/Hubble & NASA Acknowledgement: D. Calzetti (University of Massachusetts) and the LEGUS Team |
Lizenz
  |
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:
|
 |
Diese Datei ist lizenziert unter der Creative-Commons-Lizenz „Namensnennung 4.0 international“.
Namensnennung: ESA/Hubble
- Dieses Werk darf von dir
- verbreitet werden – vervielfältigt, verbreitet und öffentlich zugänglich gemacht werden
- neu zusammengestellt werden – abgewandelt und bearbeitet werden
- Zu den folgenden Bedingungen:
- Namensnennung – Du musst angemessene Urheber- und Rechteangaben machen, einen Link zur Lizenz beifügen und angeben, ob Änderungen vorgenommen wurden. Diese Angaben dürfen in jeder angemessenen Art und Weise gemacht werden, allerdings nicht so, dass der Eindruck entsteht, der Lizenzgeber unterstütze gerade dich oder deine Nutzung besonders.
Dateiversionen
Klicke auf einen Zeitpunkt, um diese Version zu laden.
| Version vom | Vorschaubild | Maße | Benutzer | Kommentar | |
|---|---|---|---|---|---|
| aktuell | 12:51, 23. Sep. 2014 | | 4.113 × 3.977 (14,79 MB) | wikimediacommons>Fabian RRRR | higher resolution |
Dateiverwendung
Die folgende Seite verwendet diese Datei:
