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Resumé

Beschreiwung
English: This NASA Spitzer Space Telescope image reveals a glowing stellar nursery embedded within the Elephant's Trunk Nebula, an elongated dark globule within the emission nebula IC 1396 in the constellation of Cepheus. Located at a distance of 2,450 light-years, the globule is a condensation of dense gas that is barely surviving the strong ionizing radiation from a nearby massive star. The globule is being compressed by the surrounding ionized gas.

The Spitzer Space Telescope pierces through the obscuration to reveal the birth of new protostars, or embryonic stars, and previously unseen young stars. The infrared image was obtained by Spitzer's infrared array camera and is a four-color composite of invisible light, showing emissions from wavelengths of 3.6 microns (blue), 4.5 microns (green), 5.8 microns (orange) and 8.0 microns (red). The filamentary appearance of the globule results from the sculpting effects of competing physical processes. The winds from a massive star, located to the left of the image, produce a dense circular rim comprising the 'head' of the globule and a swept-back tail of gas.

A pair of young stars (LkHa 349 and LkHa 349c) that formed from the dense gas has cleared a spherical cavity within the globule head. While one of these stars is significantly fainter than the other in visible-light images, they are of comparable brightness in the infrared Spitzer image. This implies the presence of a thick and dusty disc around LkHa 349c. Such circumstellar discs are the precursors of planetary systems. They are much thicker in the early stages of stellar formation when the placental planet-forming material (gas and dust) is still present.
Quell http://www.spitzer.caltech.edu/images/1054-ssc2003-06a1-Spitzer-IRAC-composite-image-of-a-dark-globule-in-IC-1396
Auteur NASA/JPL-Caltech/W. Reach (SSC/Caltech)

Lizenz

Public domain Diese Datei ist gemeinfrei (public domain), da sie von der NASA erstellt worden ist. Die NASA-Urheberrechtsrichtlinie besagt, dass „NASA-Material nicht durch Urheberrecht geschützt ist, wenn es nicht anders angegeben ist“. (NASA-Urheberrechtsrichtlinie-Seite oder JPL Image Use Policy).
Warnung:

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(All user names refer to en.wikipedia)

  • 2003-12-22 07:11 Davodd 571×470×8 (52809 bytes) Elephant's Trunk Nebula (large) from NASA.gov

Beschreiwungen

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Bild des Elefantenrüssel-Nebels IC 1396A im Sternbild Cepheus mit dem Spitzer-Weltraumteleskop. Der Emissionsnebel ist ein Sternentstehungsgebiet und enthält den offenen Sternhaufen IC 1396.

In dieser Datei abgebildete Objekte

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MIME-Typ Däitsch

image/jpeg

Prüfsumme Däitsch

26a47fc6fc4c042e2cc60845ca3b849500172c3c

Dateigröße Däitsch

1.319.388 Byte

939 Pixel

1.142 Pixel

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Versioun vumMiniaturbildDimensiounenBenotzerBemierkung
aktuell22:59, 6. Okt. 2016Miniaturbild fir d'Versioun vum 22:59, 6. Okt. 20161.142 × 939 (1,26 MB)HuntsterStraight from NASA source, rather than conversion from TIFF.
15:46, 12. Mäe. 2009Miniaturbild fir d'Versioun vum 15:46, 12. Mäe. 20091.142 × 939 (911 KB)Cäsium137~commonswikibetter size
10:02, 11. Jun. 2007Miniaturbild fir d'Versioun vum 10:02, 11. Jun. 2007571 × 470 (52 KB)Liftarn{{Information |Description=Elephant's Trunk Nebula (large) from NASA.gov |Source=Originally from [http://en.wikipedia.org en.wikipedia]; description page is/was [http://en.wikipedia.org/w/index.php?title=Image%3A54345main_ic1396_highres.jpg here]. |Date=2

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