VLT-Besucher aus dem All
In diesem beeindruckenden Bild der Woche sehen wir das Very Large Telescope (VLT) am Paranal-Observatorium der ESO unter einem Dach aus Sternen, beleuchtet vom grünen Schein eines vorbeiziehenden Meteors. Rechts neben den vier imposanten VLT-Hauptteleskopen vervollständigt das VLT Survey Telescope das Bild. Während die helle Sternschnuppe über einem der Hilfsteleskope des VLT ganz links im Bild hinwegfliegt, verrät das von ihr ausgestrahlte Licht tatsächlich ein wenig über diesen kosmischen Besucher.
Meteore entstehen durch kleinere Bruchstücke von Asteroiden, die sich im Weltraum abgelöst haben und zu Meteoroiden werden. Diese können dann zu Meteoren werden, wenn sie in die Erdatmosphäre eindringen, und zu Meteoriten, wenn sie auf dem Boden auftreffen. Wenn ein Meteoroid unsere Atmosphäre durchquert, erwärmt er sich durch die Reibung zwischen seiner festen Oberfläche und der Atmosphäre, wodurch Atome freigesetzt und ionisiert werden, die aufleuchten und einen hellen Streifen am Himmel hinterlassen, den Meteor. Je schneller und größer der Meteoroid ist, desto heller ist die Sternschnuppe, während die Farbe darauf hinweist, welche Atome ionisiert werden. In diesem Beispiel deuten grünliche Streifen darauf hin, dass dieser Meteor möglicherweise Magnesium in dem Mix aus leuchtenden Stoffen enthielt.
Herkunftsnachweis:
ESO/N. Schafer
Über das Bild
| ID: | potw2525a |
| Sprache: | de |
| Typ: | Fotografisch |
| Veröffentlichungsdatum: | 23. Juni 2025 06:00 |
| Größe: | 6000 x 4000 px |
Über das Objekt
| Name: | Meteor, Milky Way, Very Large Telescope |
| Typ: | Solar System : Sky Phenomenon : Night Sky : Trail : Meteor Milky Way : Sky Phenomenon : Night Sky : Milky Way Unspecified : Technology : Observatory |
Bildformate
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