Der Gürtel der Venus über dem Cerro Paranal
Dieses Foto zeigt den Blick in östlicher Richtung vom Paranal-Observatorium aus, nur Sekunden nachdem die Sonne hinter dem Horizont untergetaucht ist. Der orangefarbene Schein des Sonnenuntergangs liegt in Richtung der 1,8 Meter-Hilfsteleskope des VLT und der fast volle Mond steht am Himmel. Aber das Bild ist dank eines atmosphärischen Phänomens mit dem Namen Gürtel der Venus noch interessanter.
Der grau-bläuliche Schatten über dem Horizont ist der Schatten der Erde und gerade oberhalb ist ein rosafarbenes Leuchten sichtbar. Dieses Phänomen wird durch das rötliche Licht der untergehenden Sonne durch Rückstreuung in der Erdatmosphäre erzeugt. So wie auch gerade nach dem Sonnenuntergang kann dieser atmosphärische Effekt auch kurz vor dem Sonnenaufgang beobachtet werden. Ein ähnlicher Effekt tritt auch während einer totalen Sonnenfinsternis auf.
Die im Bild sichtbaren Teleskope sind drei der vier 1,8 Meter-Hilfsteleskope, die in ultrakompakten beweglichen Kuppelbauten untergebracht sind. Diese Teleskope werden bei interferometrischen Beobachtungen eingesetzt, wenn zwei oder mehr Teleskope zusammenarbeiten um einen einzigen „virtuellen Spiegel“ zu bilden und damit Astronomen einen viel genaueren Blick auf Objektdetails zu erlauben, als es mit den einzelnen unabhängig voneinander arbeitenden Teleskopen möglich wäre.
Carolin Liefke hat dieses Foto während eines Paranal-Besuchs aufgenommen und in der „Your ESO Pictures"-Flickrgruppe veröffentlicht. Die Flickrgruppe wird regelmäßig durchgesehen, und die besten Aufnahmen werden als Bild der Woche oder in unser Bildergalerie veröffentlicht. Carolin Liefke arbeitet in Heidelberg am Haus der Astronomie in im Bereich astronomischer Bildungs- und Öffentlichkeitsarbeit und ist Mitglied des ESO Science Outreach Networks (ESON). ESON bringt Neues von der ESO in Form übersetzter Pressemitteilungen in die Mitgliedsländer und bietet lokale Ansprechpartner für die Medien.
Links
- Haus der Astronomie
- Die "Your ESO Pictures"-Flickrgruppe
- Das ESO Science Outreach Network
- Carolin Liefkes Flickr-Fotostream
- Dieses Bild bei Flickr
C. Liefke/ESO
Über das Bild
| ID: | potw1331a |
| Sprache: | de-be |
| Typ: | Fotografisch |
| Veröffentlichungsdatum: | 5. August 2013 10:00 |
| Größe: | 3746 x 2514 px |
Über das Objekt
| Name: | Auxiliary Telescopes, Moon, Very Large Telescope Interferometer |
| Typ: | Solar System : Planet : Satellite Unspecified : Sky Phenomenon : Light Phenomenon : Ray-Shadow : Earth shadow Unspecified : Technology : Observatory |
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