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- PHOTO FILE NO.: STScI-PF95-18 RELEASE DATE: March 31, 1995
-
-
- HUBBLE TRACKS JUPITER STORMS
-
- NASA's Hubble Space Telescope is following dramatic and rapid changes
- in Jupiter's turbulent atmosphere that will be critical for targeting
- observations made by the Galileo space probe when it arrives at the
- giant planet later this year.
-
- This Hubble image provides a detailed look at a unique cluster of three
- white oval-shaped storms that lie southwest (below and to the left) of
- Jupiter's Great Red Spot. The appearance of the clouds, as imaged on
- February 13, 1995 is considerably different from their appearance only
- seven months earlier. Hubble shows these features moving closer
- together as the Great Red Spot is carried westward by the prevailing
- winds while the white ovals are swept eastward. (This change in
- appearance is not an effect of last July's comet Shoemaker- Levy 9
- collisions with Jupiter.)
-
- The outer two of the white storms formed in the late 1930s. In the
- centers of these cloud systems the air is rising, carrying fresh
- ammonia gas upward. New, white ice crystals form when the upwelling
- gas freezes as it reaches the chilly cloud top level where temperatures
- are -200 degrees Fahrenheit (-130 degrees Centigrade).
-
- The intervening white storm center, the ropy structure to the left of
- the ovals, and the small brown spot have formed in low pressure cells.
- The white clouds sit above locations where gas is descending to lower,
- warmer regions. The extent of melting of the white ice exposes varied
- amounts of Jupiter's ubiquitous brown haze. The stronger the down
- flow, the less ice, and the browner the region.
-
- A scheduled series of Hubble observations will help target regions of
- interest for detailed scrutiny by the Galileo spacecraft, which will
- arrive at Jupiter in early December 1995. Hubble will provide a global
- view of Jupiter while Galileo will obtain close-up images of structure
- of the clouds that make up the large storm systems such as the Great
- Red Spot and white ovals that are seen in this picture.
-
- This color picture is assembled from a series of images taken by the
- Wide Field Planetary Camera 2, in planetary camera mode, when Jupiter
- was at a distance of 519 million miles (961 million kilometers) from
- Earth. These images are part of a set of data obtained by a Hubble
- Space Telescope (HST) team headed by Reta Beebe of New Mexico State
- University.
-
- Credit: Reta Beebe, Amy Simon (New Mexico State Univ.), and NASA
-
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- NOTE TO EDITORS: This image is available elecronically through
- Internet via World Wide Web, ftp, or Gopher.
- The Internet addresses are:
-
- ftp: ftp.stsci.edu (IP address: 130.167.1.2)
- www: http://www.stsci.edu
- gopher: www.stsci.edu
-
- The image file name is: JupiterWS.gif Color Jupiter
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