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NASA’s Mars Reconnaissance, Odyssey orbiters discover Martian Slopes where Water possibly flowed

 

Written by Guy Webster
NASA’s Jet Propulsion Laboratory

NASA - National Aeronautics and Space AdministrationPasadena, CA – NASA spacecraft orbiting Mars have returned clues for understanding seasonal features that are the strongest indication of possible liquid water that may exist today on the Red Planet.

The features are dark, finger-like markings that advance down some Martian slopes when temperatures rise. The new clues include corresponding seasonal changes in iron minerals on the same slopes and a survey of ground temperatures and other traits at active sites.

This image combines a photograph of seasonal dark flows on a Martian slope with a grid of colors based on data collected by a mineral-mapping spectrometer observing the same area. (NASA/JPL-Caltech/UA/JHU-APL)

This image combines a photograph of seasonal dark flows on a Martian slope with a grid of colors based on data collected by a mineral-mapping spectrometer observing the same area. (NASA/JPL-Caltech/UA/JHU-APL)

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NASA’s Mars Reconnaissance Orbiter finds evidence Mars Crater could have held Underground Water

 

Written by Guy Webster
NASA’s Jet Propulsion Laboratory

NASA - National Aeronautics and Space AdministrationPasadena, CA – A NASA spacecraft is providing new evidence of a wet underground environment on Mars that adds to an increasingly complex picture of the Red Planet’s early evolution.

The new information comes from researchers analyzing spectrometer data from NASA’s Mars Reconnaissance Orbiter, which looked down on the floor of McLaughlin Crater. The Martian crater is 57 miles (92 kilometers) in diameter and 1.4 miles (2.2 kilometers) deep. McLaughlin’s depth apparently once allowed underground water, which otherwise would have stayed hidden, to flow into the crater’s interior.

This view of layered rocks on the floor of McLaughlin Crater shows sedimentary rocks that contain spectroscopic evidence for minerals formed through interaction with water. The High Resolution Imaging Science Experiment (HiRISE) camera on NASA's Mars Reconnaissance Orbiter recorded the image. (Image Credit: NASA/JPL-Caltech/Univ. of Arizona)

This view of layered rocks on the floor of McLaughlin Crater shows sedimentary rocks that contain spectroscopic evidence for minerals formed through interaction with water. The High Resolution Imaging Science Experiment (HiRISE) camera on NASA’s Mars Reconnaissance Orbiter recorded the image. (Image Credit: NASA/JPL-Caltech/Univ. of Arizona)

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NASA’s twin Van Allen Probes sheds light on the mysteries surrounding Earth’s Radiation Belt System

 

Johns Hopkins University/Applied Physics Laboratory (JHU/APL)

NASA - National Aeronautics and Space AdministrationLaurel, MD – Just 96 days since their launch, NASA’s twin Van Allen Probes have already provided new insights into the structure and behavior of the radiation belts that surround Earth, giving scientists a clearer understanding about the fundamental physical properties of these regions more than half a century after their discovery.

In a press conference at the American Geophysical Union’s 2012 Fall Meeting in San Francisco, members of the Van Allen Probes science team discussed current findings made in unlocking the mysteries of the radiation belts.

A graphic depicting the twin Van Allen Probes in orbit within Earth's magnetic field. (Credit: JHU/APL)

A graphic depicting the twin Van Allen Probes in orbit within Earth’s magnetic field. (Credit: JHU/APL)

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NASA’s MESSENGER spacecraft data confirms Ice at Mercury’s poles, some covered in Dark Material

 

Written by Dr. Tony Phillips
Science at NASA

NASA - National Aeronautics and Space AdministrationWashington, D.C. – Observations by NASA’s MESSENGER spacecraft provide compelling support for the long-held hypothesis that Mercury harbors abundant water ice and other frozen materials in permanently shadowed polar craters.

“The new data indicate the water ice in Mercury’s polar regions, if spread over an area the size of Washington, D.C., would be more than 2 miles thick,” said David Lawrence, a MESSENGER participating scientist at the Johns Hopkins University Applied Physics Laboratory (APL) in Laurel, MD, and lead author of one of three papers describing the findings in the online edition of Science Express.

Mercury's north pole. Red denotes areas that are in shadow in all images acquired by MESSENGER to date. (The mapping of shadows is still incomplete near the pole.) Yellow shows the locations of bright polar deposits imaged by Earth-based radar. Updated from N. L. Chabot et al., Journal of Geophysical Research, 117. (Image Credit: NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington/National Astronomy and Ionosphere Center, Arecibo Observatory)

Mercury’s north pole. Red denotes areas that are in shadow in all images acquired by MESSENGER to date. (The mapping of shadows is still incomplete near the pole.) Yellow shows the locations of bright polar deposits imaged by Earth-based radar. Updated from N. L. Chabot et al., Journal of Geophysical Research, 117. (Image Credit: NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington/National Astronomy and Ionosphere Center, Arecibo Observatory)

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NASA’s Dawn spacecraft reveals Hydrated Minerals on the Giant Asteroid Vesta’s surface

 

Written by Jia-Rui C. Cook
NASA’s Jet Propulsion Laboratory

NASA - National Aeronautics and Space AdministrationPasadena, CA – NASA’s Dawn spacecraft has revealed that the giant asteroid Vesta has its own version of ring around the collar. Two new papers based on observations from the low-altitude mapping orbit of the Dawn mission show that volatile, or easily evaporated materials, have colored Vesta’s surface in a broad swath around its equator.

Pothole-like features mark some of the asteroid’s surface where the volatiles, likely water, released from hydrated minerals boiled off. While Dawn did not find actual water ice at Vesta, there are signs of hydrated minerals delivered by meteorites and dust evident in the giant asteroid’s chemistry and geology. The findings appear today in the journal Science.

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NASA’s Lunar Reconnaissance Orbiter’s radar shows the Moon’s Shackleton crater walls may hold patchy Ice

 

Small patches of ice could make up at most five to ten percent of material in walls of Shackleton crater.

NASA - National Aeronautics and Space AdministrationGreenbelt, MD – Scientists using the Mini-RF radar on NASA’s Lunar Reconnaissance Orbiter (LRO) have estimated the maximum amount of ice likely to be found inside a permanently shadowed lunar crater located near the moon’s South Pole.

As much as five to ten percent of material, by weight, could be patchy ice, according to the team of researchers led by Bradley Thomson at Boston University’s Center for Remote Sensing, in Massachusetts.

NASA's Lunar Reconnaissance Orbiter has been studying the moon since June 2009. (Credit: NASA)

NASA’s Lunar Reconnaissance Orbiter has been studying the moon since June 2009. (Credit: NASA)

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Tennessee Oncology Welcomes Dr. Olaide Ajayi to it’s Clarksville Office

 

Nationally Recognized Cancer Treatment Team Expands in Clarksville

Tennessee OncologyClarksville, TN – Tennessee Oncology, one of the nation’s leading teams of cancer care specialists, recently announced that Olaide Ajayi, M.D. has joined the medical staff at Tennessee Oncology’s Clarksville location.

He will serve as a medical oncologist and hematologist, providing specialized treatment to cancer patients in their local community. Dr. Ajayi is the latest addition to the more than 60 Tennessee Oncology physicians practicing in 30 locations across Middle Tennessee.

Dr. Olaide Ajayi

Dr. Olaide Ajayi

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