Ein hypnotisierender Anblick auf dem Paranal
„Ich konnte es kaum glauben, dass ich die Gelegenheit haben würde, auf dem Paranal zirkumpolare Strichspuren aufzunehmen. Das war zweifellos eine der unglaublichsten Erfahrungen, die ich als Fotograf gemacht habe“, erinnert sich Osvaldo Castillo, der chilenische Astrofotograf, der für dieses atemberaubende Bild der Woche verantwortlich ist.
Die kreisförmigen Spuren der Sterne werden durch die Rotation der Erde um ihre eigene Achse verursacht. Der Punkt, an dem die Rotationsachse der Erde das Himmelsgewölbe schneidet, wird als Himmelspol bezeichnet. In diesem Bild hier ist dies der Mittelpunkt, um den sich alle diese Sterne zu bewegen scheinen – daher der Name zirkumpolare Strichspuren.
Osvaldo Castillo gelang es, diese hypnotisierende Bewegung am Paranal-Observatorium der ESO in Chile einzufangen. Da das obere Ende eines der Hilfsteleskope fast perfekt auf den südlichen Himmelspol zeigt, scheint es, als drehe sich der gesamte Himmel um das Teleskop und rückt es so in den Mittelpunkt der Aufmerksamkeit.
Aber das Fotografieren solcher Strichspuren ist keine leichte Aufgabe. Über mehrere Stunden hinweg müssen zahlreiche Aufnahmen mit langer Belichtungszeit gemacht werden — eine leichte Fehljustierung kann das Ergebnis vollständig ruinieren, da die endgültigen Spuren erst sichtbar werden, wenn die einzelnen Bilder zusammengefügt werden. Und da sich das Teleskop bewegt, während es auf verschiedene Himmelsregionen zeigt, müssen für Vorder- und Hintergrund separate Aufnahmen gemacht werden. Osvaldo Castillo erklärt, dass er „fast 300 Bilder gemacht hat und man das Ergebnis nicht sofort sehen kann. Glücklicherweise waren die Berechnung und die Ausrichtung nach Süden genau.“ Zum Glück für uns! Denn jetzt können wir dieses faszinierende Bild der Woche genießen!
Bildnachweis:O. Castillo/ESO
Über das Bild
| ID: | potw2546a |
| Sprache: | de-be |
| Typ: | Fotografisch |
| Veröffentlichungsdatum: | 17. November 2025 06:00 |
| Größe: | 3940 x 5922 px |
Über das Objekt
| Typ: | Unspecified : Sky Phenomenon : Night Sky : Trail : Star Unspecified : Technology : Observatory |
Bildformate
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