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Image: Hubble lunar imagery
The Hubble Space Telescope sent back visible-light imagery of the region around Schroter's Valley and Aristarchus Crater on the moon, at left, as well as ultraviolet imagery of the same area, at right. The ultraviolet view, seen in false color, helped scientists identify the spectral signature of a potentially valuable mineral called ilmenite (titanium and iron oxide).
updated 10/19/2005 5:36:14 PM ET 2005-10-19T21:36:14

This summer, scientists pointed the Hubble Space Telescope at the moon to take a closer look at its soil.

The results were announced Wednesday.

"Our initial findings support the potential existence of some unique varieties of oxygen–rich glassy soils in both the Aristarchus and Apollo 17 regions. They could be well-suited for visits by robots and human explorers to learn how to live off the land on the moon," said NASA's Jim Garvin, lead scientist on the project.

Hubble wasn't specifically designed to look at the moon: For an object that close, it can provide only enough resolution to spot a football field. Nevertheless, scientists can use the ultraviolet capability of Hubble's Advanced Camera for Surveys to analyze the contents of lunar soil, particularly minerals and ore that might contain oxygen.

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Since the moon does not have a breathable atmosphere, and spacecraft have limited load capacities, harvesting oxygen from the soil may be critical for long-term human missions. Hubble found that the soil in the regions examined contained abundant amounts of ilmenite, a mixture of titanium, iron and oxygen.

Laboratory experiments on Earth have shown that applying certain chemical processes to terrestrial ilmenite can easily liberate oxygen and water. Water can then be turned into oxygen and hydrogen, which could also be used for rocket fuel.

"The idea is to utilize resources there to reduce the costs of going to the Moon," project member Mark Robinson of Northwestern University said during the a NASA briefing on Wednesday.

Other studies have found evidence for water ice near the lunar poles. While those areas might serve well for human outposts, they are not necessarily the first choices for science missions.

The Hubble team examined three lunar sites, including the Apollo 15 and 17 landing sites, where soil chemistry is well-known. The third was the Aristarchus Crater region, a "geologic wonderland" that has piqued geologists' interest for decades.

Aristarchus Crater is the brightest feature of the Moon's near side, nearly twice as bright as most spots on the moon and visible to the naked eye. It's just 25 miles (40 kilometers) across but more than 2 miles (3.2 kilometers) deep. At only 450 million years old, it is one of the younger major features on the moon.

More importantly, it sits in a region of the moon that scientists believe was once rocked by volcanic explosions and tectonic shifts. The 2-mile gouge exposes the historical record of what went on in the region, including the history of crust and mantle formation on a young satellite.

"Right in the midst of [this region] is this whopping big, very young crater that cut through the whole section," Garvin said. "And in geology, we like cross sections." 

Aristarchus Crater was the planned landing site for Apollo 18, but no human or robot has ever set foot there, making it a likely target for the Lunar Reconnaissance Orbiter as it explores the lunar surface in 2008, according to current plans. Data from that mission, combined with Hubble's observations, will help plan the location of future robotic and human missions.

"This is a jump-start for lunar exploration and science in the context of what we know," Garvin said.

© 2013 Space.com. All rights reserved. More from Space.com.

Video: Lunar prospecting


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