File:54345main ic1396 highres.jpg
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Summary
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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. |
Source | http://www.spitzer.caltech.edu/images/1054-ssc2003-06a1-Spitzer-IRAC-composite-image-of-a-dark-globule-in-IC-1396 |
Author | NASA/JPL-Caltech/W. Reach (SSC/Caltech) |
Licensing
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This file is in the public domain in the United States because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, NASA copyright policy page or JPL Image Use Policy.) | ||
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Original upload log
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- 2003-12-22 07:11 Davodd 571×470×8 (52809 bytes) Elephant's Trunk Nebula (large) from NASA.gov
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 22:59, 6 October 2016 | 1,142 × 939 (1.26 MB) | Huntster (talk | contribs) | Straight from NASA source, rather than conversion from TIFF. | |
15:46, 12 March 2009 | 1,142 × 939 (911 KB) | Cäsium137~commonswiki (talk | contribs) | better size | ||
10:02, 11 June 2007 | 571 × 470 (52 KB) | Liftarn (talk | contribs) | {{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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Image title |
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Author | Spitzer Space Telescope |
Copyright holder | http://www.spitzer.caltech.edu/Media/mediaimages/copyright.shtml |
Short title |
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Credit/Provider | NASA/JPL-Caltech/W. Reach (SSC/Caltech) |
Headline | This NASA Spitzer Space Telescope image reveals a glowing stellar nursery embedded within the dark Elephant's Trunk Nebula. Spitzer pierces through the obscuration to reveal the birth of new protostars, or embryonic stars, and previously unseen young stars. |
Source | Spitzer Space Telescope |
Usage terms | |
Date and time of data generation | 18 December 2003 |
Width | 1,142 px |
Height | 939 px |
Bits per component |
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Compression scheme | LZW |
Pixel composition | RGB |
Orientation | Normal |
Number of components | 3 |
Horizontal resolution | 300 dpi |
Vertical resolution | 300 dpi |
Data arrangement | chunky format |
Software used | Adobe Photoshop CS3 Macintosh |
File change date and time | 14:38, 5 June 2009 |
Color space | Uncalibrated |
Contact information |
http://www.spitzer.caltech.edu 1200 E. California Blvd. Pasadena, CA, 91125 USA |
Keywords |
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IIM version | 2 |