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Topic: Axis

NASA’s Cassini Spacecraft finds evidence that Saturn’s Moon Enceladus axis may have shifted

 

Written by Preston Dyches
NASA’s Jet Propulsion Laboratory

NASA - National Aeronautics and Space AdministrationPasadena, CA – Saturn’s icy, ocean-bearing moon Enceladus may have tipped over in the distant past, according to recent research from NASA’s Cassini mission. Researchers with the mission found evidence that the moon’s spin axis — the line through the north and south poles — has reoriented, possibly due to a collision with a smaller body, such as an asteroid.

Examining the moon’s features, the team showed that Enceladus appears to have tipped away from its original axis by about 55 degrees — more than halfway toward rolling completely onto its side.

Working with image data from NASA's Cassini mission, researchers have found evidence that Saturn's moon Enceladus may have tipped over, reorienting itself so that terrain closer to its original equator was relocated to the poles. (NASA/JPL-Caltech/Space Science Institute/Cornell University)

Working with image data from NASA’s Cassini mission, researchers have found evidence that Saturn’s moon Enceladus may have tipped over, reorienting itself so that terrain closer to its original equator was relocated to the poles. (NASA/JPL-Caltech/Space Science Institute/Cornell University)

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NASA uses satellite data to solve questions about Earth’s rotational wobbles

 

Written by Alan Buis
NASA’s Jet Propulsion Laboratory

NASA - National Aeronautics and Space AdministrationPasadena, CA – Using satellite data on how water moves around Earth, NASA scientists have solved two mysteries about wobbles in the planet’s rotation — one new and one more than a century old. The research may help improve our knowledge of past and future climate.

Although a desktop globe always spins smoothly around the axis running through its north and south poles, a real planet wobbles. Earth’s spin axis drifts slowly around the poles; the farthest away it has wobbled since observations began is 37 feet (12 meters).

Earth does not always spin on an axis running through its poles. Instead, it wobbles irregularly over time, drifting toward North America throughout most of the 20th Century (green arrow). That direction has changed drastically due to changes in water mass on Earth. (NASA/JPL-Caltech)

Earth does not always spin on an axis running through its poles. Instead, it wobbles irregularly over time, drifting toward North America throughout most of the 20th Century (green arrow). That direction has changed drastically due to changes in water mass on Earth. (NASA/JPL-Caltech)

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Austin Peay State University professor Antonio Thompson researching history of World War II POWs in Tennessee

 

Austin Peay State University - APSUClarksville, TN – As thousands of American men traveled overseas to fight for the Allied forces during World War II, a surprising number of captured Axis prisoners of war (POWs) were making the opposite intercontinental journey.

A total of 425,000 Axis (Germany, Italy and Japan) POWs were held all across the United States in nearly every state. This marked the first time since the Civil War that large numbers of POWs were held on American soil.

APSU professor Dr. Antonio Thompson

APSU professor Dr. Antonio Thompson

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Austin Peay State University Provost Lecture Series to discuss Axis Prisoners of War (POWs)

 

Austin Peay State UniversityClarksville, TN – An Austin Peay State University history faculty member whose research focuses on prisoners of war (POW) will talk about the Axis POWs held in the U.S. during World War II as part of the next Provost Lecture Series at APSU.

Dr. Antonio Thompson, associate professor of history, will present at 3:00pm, Thursday, November 15th in the Morgan University Center, Room 303. All sessions of the Provost Lecture Series are free and open to the public. «Read the rest of this article»

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