Fichier:Sapas Mons.jpg
Taille de cet aperçu : 600 × 600 pixels. Autres résolutions : 240 × 240 pixels | 480 × 480 pixels | 768 × 768 pixels | 1 024 × 1 024 pixels | 2 048 × 2 048 pixels | 3 072 × 3 072 pixels.
Fichier d’origine (3 072 × 3 072 pixels, taille du fichier : 1,9 Mio, type MIME : image/jpeg)
Ce fichier et sa description proviennent de Wikimedia Commons.
Description
| Description | This false-color image shows the volcano Sapas Mons, which is located in the broad equatorial rise called Atla Regio (8 degrees north latitude and 188 degrees east longitude). The area shown is approximately 650 kilometers (404 miles) on a side. Sapas Mons measures about 400 kilometers (248 miles) across and 1.5 kilometers (0.9 mile) high. Its flanks show numerous overlapping lava flows. The dark flows on the lower right are thought to be smoother than the brighter ones near the central part of the volcano. Many of the flows appear to have been erupted along the flanks of the volcano rather than from the summit. This type of flank eruption is common on large volcanoes on Earth, such as the Hawaiian volcanoes. The summit area has two flat-topped mesas, whose smooth tops give a relatively dark appearance in the radar image. Also seen near the summit are groups of pits, some as large as one kilometer (0.6 mile) across. These are thought to have formed when underground chambers of magma were drained through other subsurface tubes and lead to a collapse at the surface. A 20 kilometer-diameter (12-mile diameter) impact crater northeast of the volcano is partially buried by the lava flows. Little was known about Atla Regio prior to Magellan. The new data, acquired in February 1991, show the region to be composed of at least five large volcanoes such as Sapas Mons, which are commonly linked by complex systems of fractures or rift zones. If comparable to similar features on Earth, Atla Regio probably formed when large volumes of molten rock upwelled from areas within the interior of Venus known as'hot spots.' Magellan is a NASA spacecraft mission to map the surface of Venus with imaging radar. The basic scientific instrument is a synthetic aperture radar, or SAR, which can look through the thick clouds perpetually shielding the surface of Venus. Magellan is in orbit around Venus which completes one turn around its axis in 243 Earth days. That period of time, one Venus day, is the length of a Magellan mapping cycle. The spacecraft completed its first mapping cycle and primary mission on May 15, 1991, and immediately began its second cycle. During the first cycle, Magellan mapped more than 80 percent of the planet's surface and the current and subsequent cycles of equal duration will provide complete mapping of Venus. Magellan was launched May 4, 1989, aboard the space shuttle Atlantis and went into orbit around Venus August 10, 1990. |
| Source | http://photojournal.jpl.nasa.gov/catalog/PIA00203 |
| Auteur | JPL/NASA |
|
Cette image ou vidéo a été cataloguée par le Jet Propulsion Lab de la National Aeronautics and Space Administration (NASA) des États-Unis sous Photo ID : PIA00203.Ce bandeau n’indique rien sur le statut de l’œuvre au regard du droit d'auteur. Un bandeau de droit d’auteur est requis. Voir Commons:À propos des licences pour plus d’informations. Autres langues :
|
Conditions d’utilisation
|
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 | Cette image est annotée : Voir les annotations sur Wikimedia Commons |
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 | 25 novembre 2007 à 00:58 | | 3 072 × 3 072 (1,9 Mio) | Lotse | {{Information |Description=This false-color image shows the volcano Sapas Mons, which is located in the broad equatorial rise called Atla Regio (8 degrees north latitude and 188 degrees east longitude). The area shown is approximately 650 kilometers (404 |
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
- Utilisation sur bg.wikipedia.org
- Utilisation sur de.wikipedia.org
- Utilisation sur en.wikipedia.org
- Utilisation sur es.wikipedia.org
- Utilisation sur gl.wikipedia.org
- Utilisation sur it.wikipedia.org
- Utilisation sur nl.wikipedia.org
- Utilisation sur pt.wikipedia.org
- Utilisation sur sk.wikipedia.org
- Utilisation sur sr.wikipedia.org
- Utilisation sur vi.wikipedia.org
- Utilisation sur www.wikidata.org
- Utilisation sur zh.wikipedia.org
