Datei:Masquerading as a double star.jpg

Datei:Masquerading as a double star.jpg

Masquerading_as_a_double_star.jpg(568 × 586 Pixel, Dateigröße: 101 KB, MIME-Typ: image/jpeg)

Diese Datei stammt aus Wikimedia Commons und kann von anderen Projekten verwendet werden. Die Beschreibung von deren Dateibeschreibungsseite wird unten angezeigt.

Beschreibung

Beschreibung
English: The object in this image is Jonckheere 900 or J 900, a planetary nebula — glowing shells of ionised gas pushed out by a dying star. Discovered in the early 1900s by astronomer Robert Jonckheere, the dusty nebula is small but fairly bright, with a relatively evenly spread central region surrounded by soft wispy edges.

Despite the clarity of this Hubble image, the two objects in the picture above can be confusing for observers. J 900’s nearby companion, a faint star in the constellation of Gemini, often causes problems for observers because it is so close to the nebula — when seeing conditions are bad, this star seems to merge into J 900, giving it an elongated appearance. Hubble’s position above the Earth’s atmosphere means that this is not an issue for the space telescope.

Astronomers have also mistakenly reported observations of a double star in place of these two objects, as the planetary nebula is quite small and compact.

J 900’s central star is only just visible in this image, and is very faint — fainter than the nebula’s neighbour. The nebula appears to display a bipolar structure, where there are two distinct lobes of material emanating from its centre, enclosed by a bright oval disc.

A version of this image was entered into the Hubble’s Hidden Treasures image processing competition by contestant Josh Barrington.
Datum
Quelle http://www.spacetelescope.org/images/potw1312a/
Urheber ESA/Hubble & NASA

Lizenz

w:de:Creative Commons
Namensnennung
Namensnennung
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:
  • The full image or footage credit must be presented in a clear and readable manner to all users, with the wording unaltered (for example: "ESA/Hubble"). Web texts should be credited to ESA/Hubble (except when used by media). The credit should not be hidden or disassociated from the image footage. Links should be active if the credit is online. See the usage rights Q&A section on the ESA copyright page for guidance.
  • ESA/Hubble materials may not be used to state or imply the endorsement by ESA/Hubble or any ESA/Hubble employee of a commercial product or service.
  • ESA/Hubble requests a copy of the product sent to them to be indexed in their archive.
  • If an image shows an identifiable person, using that image for commercial purposes may infringe that person's right of privacy, and separate permission should be obtained from the individual.
  • If images or visuals are changed significantly from the original work (apart from resizing, cropping), we suggest that the changes are mentioned after the credit line. For example "Original image by ESA/Hubble (M. Kornmesser), warping and recolouring by NN".

Notes:

  • Note that this general permission does not extend to the use of ESA/Hubble's logo, which shall remain protected and may not be used or reproduced without prior and individual written consent of ESA/Hubble.
  • Also note that music, scientific papers and code on the esahubble.org site are not released under this license and can not be used for non-ESA/Hubble products.
  • By reproducing ESA/Hubble material, in part or in full, the user acknowledges the terms on which such use is permitted.
w:de:Creative Commons
Namensnennung
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.

Kurzbeschreibungen

Ergänze eine einzeilige Erklärung, was diese Datei darstellt.

In dieser Datei abgebildete Objekte

Motiv

Dateiversionen

Klicke auf einen Zeitpunkt, um diese Version zu laden.

Version vomVorschaubildMaßeBenutzerKommentar
aktuell10:29, 25. Mär. 2013Vorschaubild der Version vom 10:29, 25. Mär. 2013568 × 586 (101 KB)wikimediacommons>JmencisomUser created page with UploadWizard

Die folgende Seite verwendet diese Datei:

Metadaten

Die News der letzten Tage