File:Changing Face of the North America Nebula.jpg
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Summary[edit]
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English: This layout of images reveals how the appearance of the North America nebula can change dramatically using different combinations of visible and infrared observations from the Digitized Sky Survey and NASA's Spitzer Space Telescope, respectively.
In this progression, the visible-light view (upper left) shows a striking similarity to the North America continent. Each is cropped to the easterly bulk (thus also the quasi-"Gulf of Mexico" region). The red region to the right is known as the "Pelican nebula," after its resemblance in visible light to a pelican. The view at upper right includes both visible and infrared observations. The hot gas comprising the North America continent and the Pelican now takes on a vivid blue hue, while red colours display the infrared light. Inky black dust features start to glow in the infrared view. In the bottom two images, only infrared light from Spitzer is shown -- data from the infrared array camera is on the left, and data from both the infrared array camera and the multi-band imaging photometer, which sees longer wavelengths, is on the right. These pictures look different in part because infrared light can penetrate dust whereas visible light cannot. Dusty, dark clouds in the visible image become transparent in Spitzer's view. In addition, Spitzer's infrared detectors pick up the glow of dusty cocoons enveloping baby stars. |
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| Source | NASA JPL | |||
| Author | NASA/JPL-Caltech/L. Rebull (SSC/Caltech) | |||
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Colour is used to display different parts of the spectrum in each of these images. In the visible-light view (upper right) from the Digitized Sky Survey, colours are shown in their natural blue and red hues. The combined visible/infrared image (upper left) shows visible light as blue, and infrared light as green and red. The infrared array camera (lower left) represents light with a wavelength of 3.6 microns as blue, 4.5 microns as green, 5.8 microns as orange, and 8.0 microns as red. In the final image, incorporating the multi-band imaging photometer data, light with a wavelength of 3.6 microns has been colour coded blue; 4.5-micron light is blue-green; 5.8-micron and 8.0-micron light are green; and 24-micron light is red.
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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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| current | 12:09, 16 February 2011 | | 6,000 × 6,003 (16.93 MB) | Originalwana (talk | contribs) | {{Information |Description ={{en|1=This image layout reveals how the appearance of the North America nebula can change dramatically using different combinations of visible and infrared observations from the [[:Category:Digitized |
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