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Hubble To Snap Mars Like Never Before

Mars as seen by Hubble in 2001

Baltimore - Aug 20, 2003
NASA's Hubble Space Telescope (HST) will make observations of the planet Mars on Aug. 26-27, when Earth and Mars will be closer together than they have been in the last 60,000 years.

As soon as Hubble's high-resolution images of the Red Planet are received at the Space Telescope Science Institute (STScI) and are digitally processed by the Mars observing team, they will be released to the public and news media via the Internet.

High-resolution files for downloading will available on HubbleSite News Center beginning at 6am EDT August 27.

The Hubble images will be the sharpest views of Mars ever taken from Earth. They will reveal surface details as small as 17 miles (24 km) across. Though NASA's Mars-orbiting spacecraft can photograph the Red Planet in much finer detail, Hubble routinely serves as a "weather satellite" for tracking atmospheric changes on Mars and for probing its geology on a global scale.

Unlike "real-time" viewing through ground-based telescopes, Hubble observations are carried out automatically by the orbiting observatory. Free of clouds and atmospheric distortion, Hubble is guaranteed a front- row seat to the celestial close encounter.

To study the planet's geology and weather, Hubble's Wide Field and Planetary Camera 2 will take separate images of Mars through as many as 10 different color filters. Hubble's unique ultraviolet- light sensitivity will allow it to trace ozone and water vapor in the Martian atmosphere.

The images will be stored in an onboard computer, transmitted to the Goddard Space Flight Center in Greenbelt, Md., and then to the Space Telescope Science Institute. Once received at STScI, the images will be calibrated and combined to make a natural, full-color view of Mars.

A key image-processing step will be to combine and register images taken through different filters. Because Mars rotates a little between each Hubble exposure, each separate picture must be precisely aligned to make a color image. This means several hours will elapse from the time of a Hubble observation to the assembly of a full-color image.

Two close-approach images will be posted on the Internet on Aug. 27.

The first view, taken the evening of Aug. 26, when Mars is 34,648,840 miles (55,760,220 km) from Earth, will be posted as a full-resolution color image for downloading after approximately 6 a.m. EDT. In the second image, taken within an hour of "closest approach," Mars will be merely 1,400 miles closer than the previous exposure.

It will be at its closest distance of 34,647,420 miles (55,757,930 km). The resolution will effectively be the same as in the earlier image. The image-processed color pictures will be posted on the Internet after 4 p.m. EDT Aug. 27.

Mars researchers Jim Bell of Cornell University in Ithaca, N.Y., and Michael Wolff of the Space Science Institute in Boulder, Colo., will be at STScI and available for media interviews beginning at 5 a.m. EDT Aug. 27.

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Spirit Heading To 'Home Plate'
Pasadena CA (JPL) Jan 09, 2006
Last week Spirit completed robotic-arm work on "El Dorado." The rover used all three of its spectrometers plus the microscopic imager for readings over the New Year's weekend.

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