Le Livre d'or • avoir tout Vikidia hors-connexion
Fichier:PIA19048 realistic color Europa mosaic edited.jpg
Fichier d’origine (3 680 × 2 720 pixels, taille du fichier : 7,41 Mio, type MIME : image/jpeg)
Ce fichier provient de Wikimedia Commons. Il peut être utilisé par d'autres projets. Sa description sur sa page de description est affichée ci-dessous.
Description
Cette image a été retouchée, ce qui signifie qu'elle a été modifiée par ordinateur et est différente de l'image d'origine. Liste des modifications : Increased linear pixel dimensions (scaled up) by a factor of 1.6 (to bring out fine detail), sharpening. L'image d'origine se trouve ici : PIA19048 realistic color Europa mosaic (original).jpg: . Modifications effectuées par WolfmanSF.
|
DescriptionPIA19048 realistic color Europa mosaic edited.jpg |
English: Uploader's notes: the original NASA TIFF image has been modified by increasing linear pixel dimensions by a factor of 1.6 (to bring out fine detail), sharpening and conversion to JPEG format. Original caption released with image: The view was previously released as a mosaic with lower resolution and strongly enhanced color (see PIA02590). To create this new version, the images were assembled into a realistic color view of the surface that approximates how Europa would appear to the human eye. The scene shows the stunning diversity of Europa's surface geology. Long, linear cracks and ridges crisscross the surface, interrupted by regions of disrupted terrain where the surface ice crust has been broken up and re-frozen into new patterns. Color variations across the surface are associated with differences in geologic feature type and location. For example, areas that appear blue or white contain relatively pure water ice, while reddish and brownish areas include non-ice components in higher concentrations. The polar regions, visible at the left and right of this view, are noticeably bluer than the more equatorial latitudes, which look more white. This color variation is thought to be due to differences in ice grain size in the two locations. Images taken through near-infrared, green and violet filters have been combined to produce this view. The images have been corrected for light scattered outside of the image, to provide a color correction that is calibrated by wavelength. Gaps in the images have been filled with simulated color based on the color of nearby surface areas with similar terrain types. This global color view consists of images acquired by the Galileo Solid-State Imaging (SSI) experiment on the spacecraft's first and fourteenth orbits through the Jupiter system, in 1995 and 1998, respectively. Image scale is 2 miles (1.6 kilometers) per pixel. North on Europa is at right. The Galileo mission was managed by NASA's Jet Propulsion Laboratory in Pasadena, California, for the agency's Science Mission Directorate in Washington. JPL is a division of the California Institute of Technology, Pasadena. Additional information about Galileo and its discoveries is available on the Galileo mission home page at http://solarsystem.nasa.gov/galileo/. More information about Europa is available at http://solarsystem.nasa.gov/europa. |
Date | |
Source |
http://photojournal.jpl.nasa.gov/catalog/PIA19048 Also described here: http://www.jpl.nasa.gov/news/news.php?release=2014-406 |
Auteur | NASA / Jet Propulsion Lab-Caltech / SETI Institute |
Autres versions |
|
Distinctions
|
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. | ||
Attention :
|
Annotations InfoField | Cette image est annotée : Voir les annotations sur Wikimedia Commons |
21 novembre 2014
image/jpeg
Historique du fichier
Cliquer sur une date et heure pour voir le fichier tel qu'il était à ce moment-là.
Date et heure | Vignette | Dimensions | Utilisateur | Commentaire | |
---|---|---|---|---|---|
Actuel | 27 octobre 2018 à 07:19 | 3 680 × 2 720 (7,41 Mio) | wikimediacommons>WolfmanSF | Linear pixel dimensions increased by a factor of 1.6; sharpened |
Utilisation du fichier
Les 4 pages suivantes utilisent ce fichier :