Fichier:Bright Lights, Green City.jpg
Fichier d’origine (3 000 × 3 000 pixels, taille du fichier : 2,35 Mio, type MIME : image/jpeg)
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Description
DescriptionBright Lights, Green City.jpg |
English: Two extremely bright stars illuminate a greenish mist in this and other images from the new GLIMPSE360 survey. This fog is comprised of hydrogen and carbon compounds called polycyclic aromatic hydrocarbons (PAHs), which are found right here on Earth in sooty vehicle exhaust and on charred grills. In space, PAHs form in the dark clouds that give rise to stars. These molecules provide astronomers a way to visualize the peripheries of gas clouds and study their structures in great detail. PAHs are not actually "green;" a representative color coding in these images lets scientists observe PAHs glow in the infrared light that Spitzer sees, and which is invisible to us.
Strange streaks - likely dust grains that lined up with magnetic fields - distort the star in the top left. The fairly close, well-studied star GL 490 gleams in the middle right. The new GLIMPSE360 observations have revealed several small blobby outflows of gas from nearby forming stars, which indicate their youth. Such outflows are a great way to target really young, massive stars in their very earliest, hard-to-catch stages. This image is a combination of data from Spitzer and the Two Micron All Sky Survey (2MASS). The Spitzer data was taken after Spitzer's liquid coolant ran dry in May 2009, marking the beginning of its "warm" mission. Light from Spitzer's remaining infrared channels at 3.6 and 4.5 microns has been represented in green and red, respectively. 2MASS 2.2 micron light is blue. |
Date | |
Source | http://www.spitzer.caltech.edu/images/3230-sig10-013-Bright-Lights-Green-City |
Auteur | NASA/JPL-Caltech/2MASS/B. Whitney (SSI/University of Wisconsin) |
Image use policy: http://www.spitzer.caltech.edu/info/18-Image-Use-Policy
Conditions d’utilisation
Public domainPublic domainfalsefalse |
Ce fichier provient de la NASA. Sauf exception, les documents créés par la NASA ne sont pas soumis à copyright. Pour plus d'informations, voir la politique de copyright de la NASA. | ||
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dépeint
27 juillet 2010
image/jpeg
345ed4a6162b0173ec1b72162c09f405e3e087d4
2 459 471 octet
3 000 pixel
3 000 pixel
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Date et heure | Vignette | Dimensions | Utilisateur | Commentaire | |
---|---|---|---|---|---|
actuel | 13 juin 2011 à 21:59 | 3 000 × 3 000 (2,35 Mio) | Spitzersteph |
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Largeur | 6 000 px |
---|---|
Hauteur | 6 000 px |
Schéma de compression | LZW |
Composition des pixels | RVB |
Titre de l’image | Two extremely bright stars illuminate a greenish mist in this and other images from the new GLIMPSE360 survey. This fog is comprised of hydrogen and carbon compounds called polycyclic aromatic hydrocarbons (PAHs), which are found right here on Earth in sooty vehicle exhaust and on charred grills. In space, PAHs form in the dark clouds that give rise to stars. These molecules provide astronomers a way to visualize the peripheries of gas clouds and study their structures in great detail. PAHs are not actually "green;" a representative color coding in these images lets scientists observe PAHs glow in the infrared light that Spitzer sees, and which is invisible to us.
Strange streaks - likely dust grains that lined up with magnetic fields - distort the star in the top left. The fairly close, well-studied star GL 490 gleams in the middle right. The new GLIMPSE360 observations have revealed several small blobby outflows of gas from nearby forming stars, which indicate their youth. Such outflows are a great way to target really young, massive stars in their very earliest, hard-to-catch stages. This image is a combination of data from Spitzer and the Two Micron All Sky Survey (2MASS). The Spitzer data was taken after Spitzer's liquid coolant ran dry in May 2009, marking the beginning of its "warm" mission. Light from Spitzer's remaining infrared channels at 3.6 and 4.5 microns has been represented in green and red, respectively. 2MASS 2.2 micron light is blue. |
Orientation | Normale |
Nombre de composantes | 3 |
Résolution horizontale | 72 pt/po |
Résolution verticale | 72 pt/po |
Arrangement des données | Format tronçonné |
Logiciel utilisé | Adobe Photoshop CS3 Macintosh |
Date de modification du fichier | 27 juillet 2010 à 16:37 |
Espace colorimétrique | sRGB |