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Using data obtained from the gamma ray spectrometer on the Kaguya spacecraft scientists have found signatures of uranium, an element not seen in previous moon-mapping efforts. In addition to uranium, the Kaguya GRS data also is showing clear signatures for thorium, potassium, oxygen, magnesium, silicon, calcium, titanium and iron.
“We’ve already gotten uranium results, which have never been reported before,” said Robert C. Reedy, senior scientists at the Planetary Science Institute. “We’re getting more new elements and refining and confirming results found on the old maps.”
Earlier gamma-ray spectrometer maps from the Apollo and Lunar Prospector missions show a few of the moon’s chemical elements. But the maps constructed by Reedy and the Kaguya GRS team — using data gathered by state-of-the-art high-energy-resolution germanium detectors — are extending the earlier results and improving our understanding of the moon’s surface composition.
Reedy and his colleagues are using measurements from the Kaguya lunar orbiter’s GRS to construct high-quality maps of as many chemical elements as possible. Kaguya was launched in September 2007 and crashed into the moon at the end of its mission on June 10 of this year.
Source: Planetary Science Institute
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