Media Information

 
 
 
Collection:
NASA Hubble Space Telescope Collection
Title:
Hubble Monitors Weather on Neighboring Planets
Object Name:
Venus
Acknowledgement:
*Credit:* L. Esposito (University of Colorado, Boulder), and NASA [ http://www.nasa.gov/]
Fast Facts:
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note:
*Image Type:*: Astronomical
note:
*Release Date*:March 21, 1995 02:00 PM (EST)
note:
*Title*:Hubble Monitors Weather on Neighboring Planets
note:
*News Release Number:*: STScI-1995-16g
note:
*Description*:

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.
facet_what:
Jupiter
facet_what:
Sun
facet_what:
Earth
facet_what:
Moon
facet_what:
Polar
facet_what:
Galileo
facet_what:
Venus
facet_what:
Mariner
facet_what:
Mariner 10
facet_what:
Pioneer Venus
facet_what:
Hubble Space Telescope (HST)
facet_where:
Jupiter
facet_where:
Colorado
facet_where:
Venus
facet_when:
March 21, 1995
facet_when:
January 24 1995
facet_when_year:
1995
UID:
SPD-HUBBLE-STScI-199 5-16g
original url:
Release Date:
March 21, 1995 02:00 PM (EST)

Hubble Monitors Weather on Neighboring Planets