SCIENCE & TECHNOLOGY
Moon may have huge water reservoirs trapped under surface: study
The Moon may have huge reservoirs of water trapped under the surface in the form of volcanic ‘glass beads’, which could be extracted and used by astronauts in future lunar colonies, scientists have found. A new study of satellite data found that numerous volcanic deposits distributed across the surface of the Moon contain unusually high amounts of trapped water.
In 2008, researchers detected trace amounts of water in some of the volcanic glass beads brought back to Earth from the Apollo 15 and 17 missions to the Moon. In 2011, further study of tiny crystalline formations within those beads revealed that they actually contain similar amounts of water as some basalts on Earth, suggesting that the Moon’s mantle contains as much water as Earth’s.”The key question is whether those Apollo samples represent the bulk conditions of the lunar interior or instead represent unusual or perhaps anomalous water-rich regions within an otherwise ‘dry’ mantle,” said Ralph Milliken, an associate professor at Brown University in the US.
“By looking at the orbital data, we can examine the large pyroclastic deposits on the Moon that were never sampled by the Apollo or Luna missions,” said Milliken.”
The fact that nearly all of them exhibit signatures of water suggests that the Apollo samples are not anomalous, so it may be that the bulk interior of the Moon is wet,” he said.Scientists used orbital spectrometers to measure the light that bounces off a planetary surface. By looking at which wavelengths of light are absorbed or reflected by the surface, scientists can get an idea of which minerals and other compounds are present. Researchers looked at data from the Moon Mineralogy Mapper, an imaging spectrometer that flew aboard India’s Chandrayaan-1 lunar orbiter.
They found evidence of water in nearly all of the large pyroclastic deposits that had been previously mapped across the Moon’s surface, including deposits near the Apollo 15 and 17 landing sites where water-bearing glass bead samples were collected. Water-rich deposits are spread across the lunar surface, which tells us that the water found in the Apollo samples is not a one-off, Milliken said. The idea that the interior of the Moon is water-rich could have implications for future lunar exploration. “Anything that helps save future lunar explorers from having to bring lots of water from home is a big step forward, and our results suggest a new alternative,” said Shuai Li, a postdoctoral researcher at the University of Hawaii in the US.
- Deccan Chronicle
NASA jets to chase solar eclipse
Twin telescopes will be mounted on the noses of the planes for observation
In a first, scientists are planning to chase the shadow of the moon using NASA’s research jets during the upcoming total solar eclipse in the U.S., in order to capture the clearest ever images of the Sun’s outer atmosphere.Amir Caspi of the Southwest Research Institute in the U.S. and his team will use two of NASA’s WB-57F research jets to follow the darkness across the U.S. on August 21. Taking observations from twin telescopes mounted on the noses of the planes, Mr. Caspi will capture
The clearest images of the Sun’s corona to date
At the planes’ cruising altitude of 50,000 feet, the sky is 20 – 30 times darker than as seen from the ground, and there is much less atmospheric turbulence, allowing fine structures and motions in the sun’s corona to be visible.Observations of Mercury will also be taken 30 minutes before and after totality, when the sky is still relatively dark. These images, taken in the infrared, will be the first attempt to map the variation of temperature across the surface of the planet.
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