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From: Stig Agermose <stig.agermose@get2net.dk>
Date: Sat, 03 Jul 1999 07:19:24
Fwd Date: Sun, 04 Jul 1999 09:56:20 -0400
Subject: RHubble Delivers Most Detailed Pictures Of Mars 


Source: News release by the Space Telescope Science Institute,

http://oposite.stsci.edu/pubinfo/pr/1999/27/index.html

Stig

***

A Closer Encounter With Mars

**

Taking advantage of Mars's closest approach to Earth in eight
years, astronomers using NASA's Hubble Space Telescope have
taken the space-based observatory's sharpest views yet of the
Red Planet. NASA is releasing these images to commemorate the
second anniversary of the Mars Pathfinder landing.

The telescope's Wide Field and Planetary Camera 2 snapped these
images between April 27 and May 6, when Mars was 54 million
miles (87 million kilometers) from Earth. From this distance the
telescope could see Martian features as small as 12 miles (19
kilometers) wide. The telescope obtained four images, which,
together, show the entire planet. Each view depicts the planet
as it completes one quarter of its daily rotation.

These Hubble telescope snapshots reveal that substantial changes
in the bright and dark markings on Mars have occurred in the 20
years since the NASA Viking spacecraft missions first mapped the
planet. These images show that the Martian surface is dynamic
and ever changing. Some regions that were dark 20 years ago are
now bright red; some areas that were bright red are now dark.
Winds move sand and dust from region to region, often in
spectacular dust storms. Over long timescales many of the larger
bright and dark markings remain stable, but smaller details come
and go as they are covered and then uncovered by sand and dust.

See the full caption for more information.

Photo credits: Steve Lee (University of Colorado), Jim Bell
(Cornell University), Mike Wolff (Space Science Institute), and
NASA

Other researchers involved in the collection and analysis of
these Hubble telescope data are R. Todd Clancy (Space Science
Institute), Philip James (University of Toledo), and Michael
Ravine (Malin Space Science Systems, Inc.).

**

The Space Telescope Science Institute is operated by the
Association of Universities for Research in Astronomy, Inc.
(AURA), for NASA, under contract with the Goddard Space Flight
Center, Greenbelt, MD. The Hubble Space Telescope is a project
of international cooperation between NASA and the European Space
Agency (ESA).


*Office of Public Outreach

outreach@stsci.edu


Copyright© 1990-1999 The Association of Universities for Research in
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