Fichier:PIA03516.jpg
Fichier d’origine (2 696 × 1 921 pixels, taille du fichier : 435 kio, type MIME : image/jpeg)
Ce fichier et sa description proviennent de Wikimedia Commons.
| Description |
These artist's concepts of Tempel 1 simulate an optical view of the comet (left), next to the simulated infrared view (right). The images illustrate the comet's shape, reflectivity, rotation rate and surface temperature, based on information from NASA's Hubble Space Telescope and Spitzer Space Telescope. Measurements from the Great Observatories indicate that the comet is a matte black object roughly 14 by 4 kilometers (8.7 by 2.5 miles), or about one-half the size of Manhattan. At the time of these early observations, March 25-27, 2005,Tempel 1 was still far enough away from the Sun that it had not yet developed its characteristic halo of evaporating gas. Hubble and Spitzer observed the comet in visible and infrared light, respectively. The comet appeared only as an unresolved dot due to the great distance, but its general shape, size and color could be deduced from the way the visible and infrared brightness varied over time. The animation simulates an optical view of the comet, followed by its appearance in infrared. Spitzer detects the comet's infrared energy or heat, depicted by the reddish glow. The movement of the comet has been dramatically sped up to 13 seconds per rotation versus its normal rotation of about 40 hours. As the comet slowly rotates, the sunlit side heats up while the dark side cools down. |
| Source | http://www.galex.caltech.edu/MEDIA/2007-02/introduction.html |
| Auteur | NASA/JPL-Caltech/UMD |
| Autorisation (Réutilisation de ce fichier) |
Original work of NASA - public domain |
|
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 :
|
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 | 16 mai 2007 à 04:06 | | 2 696 × 1 921 (435 kio) | Clh288~commonswiki | {{Information |Description=These artist's concepts of Tempel 1 simulate an optical view of the comet (left), next to the simulated infrared view (right). The images illustrate the comet's shape, reflectivity, rotation rate and surface temperature, based o |
Utilisation du fichier
La page suivante utilise ce fichier :
Usage global du fichier
Les autres wikis suivants utilisent ce fichier :
- Utilisation sur ar.wikipedia.org
