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File:Vénus par Hubble.jpg

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English: This is a NASA Hubble Space Telescope ultraviolet-light image of the planet Venus, taken on January 24 1995, when Venus was at a distance of 70.6 million miles (113.6 million kilometers) from Earth.

Venus is covered with clouds made of sulfuric acid, rather than the water-vapor clouds found on Earth. These clouds permanently shroud Venus' volcanic surface, which has been radar mapped by spacecraft and from Earth-based telescope.

At ultraviolet wavelengths cloud patterns become distinctive. In particular, a horizontal "Y"-shaped cloud feature is visible near the equator. Similar features were seen from Mariner 10, Pioneer Venus, and Galileo spacecrafts. This global feature might indicate atmospheric waves, analogous to high and low pressure cells on Earth. Bright clouds toward Venus' poles appear to follow latitude lines.

The polar regions are bright, possibly showing a haze of small particles overlying the main clouds. The dark regions show the location of enhanced sulfur dioxide near the cloud tops. From previous missions, astronomers know that such features travel east to west along with the Venus' prevailing winds, to make a complete circuit around the planet in four days.

Because Venus is closer to the Sun than Earth, the planet appears to go through phases, like the Moon. When Venus swings close to Earth the planet's disk appears to grow in size, but changes from a full disk to a crescent.

The image was taken with the Wide Field Planetary Camera-2, in PC mode. False color has been used enhance cloud features.
Français : photo de la planète Vénus prise par le télescope spatial Hubble
Date
Source http://hubblesite.org/gallery/album/solar_system/pr1995016g/web_print/
Author L. Esposito (University of Colorado, Boulder), and NASA

Licensing

Public domain 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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21 March 1995

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Date/TimeThumbnailDimensionsUserComment
current05:34, 28 March 2015Thumbnail for version as of 05:34, 28 March 2015489 × 711 (22 KB)Jcpag2012crop from original source file
05:32, 28 March 2015Thumbnail for version as of 05:32, 28 March 2015500 × 800 (23 KB)Jcpag2012higher resolution
20:46, 31 August 2010Thumbnail for version as of 20:46, 31 August 2010500 × 800 (15 KB)Jupiter75{{Information |Description={{fr|1=photo de la planète Vénus prise par le télescope spatial Hubble}} |Source=http://hubblesite.org/gallery/album/solar_system/pr1995016g/web_print/ |Author=NASA, ESA |Date=2010/08/31 |Permission= |other_versions= }}

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