Clarksville, TN Online: News, Opinion, Arts & Entertainment.


Topic: Hawaii

NASA Study finds evidence of Geothermal Heat Source under West Antarctica

 

Written by Carol Rasmussen
NASA’s Earth Science News Team

NASA - National Aeronautics and Space AdministrationWashington, D.C. – A new NASA study adds evidence that a geothermal heat source called a mantle plume lies deep below Antarctica’s Marie Byrd Land, explaining some of the melting that creates lakes and rivers under the ice sheet.

Although the heat source isn’t a new or increasing threat to the West Antarctic ice sheet, it may help explain why the ice sheet collapsed rapidly in an earlier era of rapid climate change, and why it is so unstable today.

The stability of an ice sheet is closely related to how much water lubricates it from below, allowing glaciers to slide more easily.

Illustration of flowing water under the Antarctic ice sheet. Blue dots indicate lakes, lines show rivers. Marie Byrd Land is part of the bulging "elbow" leading to the Antarctic Peninsula, left center. (NSF/Zina Deretsky)

Illustration of flowing water under the Antarctic ice sheet. Blue dots indicate lakes, lines show rivers. Marie Byrd Land is part of the bulging “elbow” leading to the Antarctic Peninsula, left center. (NSF/Zina Deretsky)

«Read the rest of this article»

Sections: Technology | No Comments
 

NASA Scientists lead International Team in Global Asteroid Tracking Test

 

Written by Dwayne Brown / Laurie Cantillo
NASA Headquarters

NASA - National Aeronautics and Space AdministrationWashington, D.C. – An international team of astronomers led by NASA scientists successfully completed the first global exercise using a real asteroid to test global response capabilities.

Planning for the so-called “TC4 Observation Campaign” started in April, under the sponsorship of NASA’s Planetary Defense Coordination Office. The exercise commenced in earnest in late July, when the European Southern Observatory’s Very Large Telescope recovered the asteroid. The finale was a close approach to Earth in mid-October.

2012 TC4's heliocentric orbit has changed due to the 2012 and 2017 close encounters with Earth. The cyan color shows the trajectory before the 2012 flyby, the magenta shows the trajectory after the 2012 flyby, and yellow shows the trajectory after the 2017 flyby. The orbital changes were primarily in semi-major axis and eccentricity, although there were also slight changes in the inclination. (NASA/JPL-Caltech)

2012 TC4’s heliocentric orbit has changed due to the 2012 and 2017 close encounters with Earth. The cyan color shows the trajectory before the 2012 flyby, the magenta shows the trajectory after the 2012 flyby, and yellow shows the trajectory after the 2017 flyby. The orbital changes were primarily in semi-major axis and eccentricity, although there were also slight changes in the inclination. (NASA/JPL-Caltech)

«Read the rest of this article»

Sections: Technology | No Comments
 


AAA reports Pump Prices Continue to Recover Amidst Busy Hurricane Season

 

AAATampa Bay, FL – The average price at the pump has fallen for 15 of the last 20 days, for a total savings of seven cents per gallon.

The national average currently sits at $2.46 per gallon, which is one cent less than one week ago, 12 cents less than one month ago and 24 cents more year-over-year. The national average is down 17 cents per gallon versus the 2017 peak price reached in September ($2.67).

The average price at the pump has fallen for 15 of the last 20 days, for a total savings of seven cents per gallon.

The average price at the pump has fallen for 15 of the last 20 days, for a total savings of seven cents per gallon.

«Read the rest of this article»

Sections: News | No Comments
 

NASA reports small Asteroid to pass close but safely past Earth

 

Written by DC Agle
NASA’s Jet Propulsion Laboratory

NASA - National Aeronautics and Space AdministrationPasadena, CA – On October 12th EDT (October 11th PDT), a small asteroid designated 2012 TC4 will safely pass by Earth at a distance of approximately 26,000 miles (42,000 kilometers). This is a little over one tenth the distance to the Moon and just above the orbital altitude of communications satellites.

This encounter with TC4 is being used by asteroid trackers around the world to test their ability to operate as a coordinated international asteroid warning network.

2012 TC4 is estimated to be 50 to 100 feet (15 to 30 meters) in size. Orbit prediction experts say the asteroid poses no risk of impact with Earth.

This image depicts the safe flyby of small asteroid 2012 TC4 as it passes under Earth on Oct. 12, 2017. While scientists cannot yet predict exactly how close the 50 to 100 foot (15 to 30 meter) wide space rock will approach, they are certain it will come no closer than 4,200 miles (6,800 kilometers) from Earth's surface. (NASA/JPL-Caltech)

This image depicts the safe flyby of small asteroid 2012 TC4 as it passes under Earth on Oct. 12, 2017. While scientists cannot yet predict exactly how close the 50 to 100 foot (15 to 30 meter) wide space rock will approach, they are certain it will come no closer than 4,200 miles (6,800 kilometers) from Earth’s surface. (NASA/JPL-Caltech)

«Read the rest of this article»

Sections: Technology | No Comments
 

Earth’s most powerful telescopes enhance NASA’s Juno Spacecraft’s Jupiter Flyby

 

Written by Laurie Cantillo / Dwayne Brown
NASA Headquarters

NASA - National Aeronautics and Space AdministrationWashington, D.C. – Telescopes in Hawaii have obtained new images of Jupiter and its Great Red Spot, which will assist the first-ever close-up study of the Great Red Spot, planned for July 10th. On that date, NASA’s Juno spacecraft will fly directly over the giant planet’s most famous feature at an altitude of only about 5,600 miles (9,000 kilometers).

Throughout the Juno mission, numerous observations of Jupiter by Earth-based telescopes have been acquired in coordination with the mission, to help Juno investigate the giant planet’s atmosphere.

This composite, false-color infrared image of Jupiter reveals haze particles over a range of altitudes, as seen in reflected sunlight. It was taken using the Gemini North telescope in Hawaii on May 18, 2017, in collaboration with observations of Jupiter by NASA's Juno mission.

This composite, false-color infrared image of Jupiter reveals haze particles over a range of altitudes, as seen in reflected sunlight. It was taken using the Gemini North telescope in Hawaii on May 18, 2017, in collaboration with observations of Jupiter by NASA’s Juno mission.

«Read the rest of this article»

Sections: Technology | No Comments
 

Fort Campbell’s Blanchfield Army Community Hospital to hold Battalion Change of Command Ceremony

 

Blanchfield Army Hospital - BACH - Fort Campbell KYFort Campbell, KY – Blanchfield Army Community Hospital will host a battalion change of command ceremony on the hospital’s A building front lawn at noon June 30th, 2017.

Lt. Col. Patrick T. Birchfield will relinquish command to Lt. Col. Deidre B. Lockhart, who most recently served in Hawaii as the Chief of Support Operations for the U.S. Army Pacific Surgeon Cell. During that time, she joined the USARPAC Coordination Element in Korea as the Deputy Director and the Republic of Korea Army 2nd Operational Command Lead Liaison.

Blanchfield Army Community Hospital will host a change of battalion command ceremony June 30th, 2017. (U.S. Army photo by David E. Gillespie)

Blanchfield Army Community Hospital will host a change of battalion command ceremony June 30th, 2017. (U.S. Army photo by David E. Gillespie)

«Read the rest of this article»

Sections: News | No Comments
 


Fort Campbell Lifeliner NCO completes journey to earning Bachelor’s Degree

 

Written by Sgt. Neysa Canfield
101st Sustainment Brigade, 101st Airborne Division (AA) Public Affairs

101st Sustainment Brigade - LifelinersFort Campbell KY - 101st Airborne Division

Fort Campbell, KY – Staff Sgt. Shenea Andrews, the chaplain assistant noncommissioned officer in charge for the 101st Airborne Division (Air Assault) Sustainment Brigade, 101st Abn. Div., proudly walked across the stage of Wilson Theater to receive her bachelor’s degree after beginning her journey almost nine years ago.

“This accomplishment means a lot to me,” said Andrews, a Tampa, Florida native. “It means all the hard work I put in mornings [before physical training], during lunch, and after work paid off.”

Staff Sgt. Shenea Andrews, the chaplain assistant noncommissioned officer in charge for the 101st Airborne Division (Air Assault) Sustainment Brigade, 101st Abn. Div., walks across the stage of Wilson Theater, June 9, 2017, to receive her bachelor’s degree during the joint graduation ceremony on Fort Campbell, Kentucky.  (Sgt. Neysa Canfield/101st SBDE Public Affairs)

Staff Sgt. Shenea Andrews, the chaplain assistant noncommissioned officer in charge for the 101st Airborne Division (Air Assault) Sustainment Brigade, 101st Abn. Div., walks across the stage of Wilson Theater, June 9, 2017, to receive her bachelor’s degree during the joint graduation ceremony on Fort Campbell, Kentucky. (Sgt. Neysa Canfield/101st SBDE Public Affairs)

«Read the rest of this article»

Sections: News | No Comments
 

NASA’s Mars Curiosity rover discovers variety of Minerals on Mars

 

Written by Laurie Cantillo / Dwayne Brown
NASA Headquarters

NASA - National Aeronautics and Space AdministrationWashington, D.C. – NASA scientists have found a wide diversity of minerals in the initial samples of rocks collected by the Curiosity rover in the lowermost layers of Mount Sharp on Mars, suggesting that conditions changed in the water environments on the planet over time.

Curiosity landed near Mount Sharp in Gale Crater in August 2012. It reached the base of the mountain in 2014. Layers of rocks at the base of Mount Sharp accumulated as sediment within ancient lakes around 3.5 billion years ago. Orbital infrared spectroscopy had shown that the mountain’s lowermost layers have variations in minerals that suggest changes in the area have occurred.

NASA's Curiosity Mars rover examined a mudstone outcrop area called "Pahrump Hills" on lower Mount Sharp, in 2014 and 2015. This view shows locations of some targets the rover studied there. The blue dots indicate where drilled samples of powdered rock were collected for analysis. (NASA/JPL-Caltech/MSSS)

NASA’s Curiosity Mars rover examined a mudstone outcrop area called “Pahrump Hills” on lower Mount Sharp, in 2014 and 2015. This view shows locations of some targets the rover studied there. The blue dots indicate where drilled samples of powdered rock were collected for analysis. (NASA/JPL-Caltech/MSSS)

«Read the rest of this article»

Sections: Technology | No Comments
 

NASA’s Convective Processes Experiment (CPEX) will try to improve Weather Forecasts

 

Written by Carol Rasmussen
NASA’s Earth Science News Team

NASA - National Aeronautics and Space AdministrationWashington, D.C. – A NASA-funded field campaign getting underway in Florida on May 25th has a real shot at improving meteorologists’ ability to answer some of the most fundamental questions about weather: Where will it rain? When? How much?

Called the Convective Processes Experiment (CPEX), the campaign is using NASA’s DC-8 airborne laboratory outfitted with five complementary research instruments designed and developed at NASA.

The plane also will carry small sensors called dropsondes that are dropped from the plane and make measurements as they fall.

Convective storm clouds over Fort Lauderdale, Florida, preceding Hurricane Sandy in 2012. (Flickr user John Spade, CC BY 2.0)

Convective storm clouds over Fort Lauderdale, Florida, preceding Hurricane Sandy in 2012. (Flickr user John Spade, CC BY 2.0)

«Read the rest of this article»

Sections: Technology | No Comments
 

AAA reports Prices at the Pump Drop for First Time in Three Weeks

 

AAATampa, FL – Gas prices have dropped slowly on the week. Today’s national average price for a gallon of regular unleaded gasoline is $2.39, a three cents drop from one week ago; however, it is an increase of nine cents over last month and 18 cents more than this time last year. One year ago, the country was experiencing higher consumer demand and prices were increasing.

Fast forward to today, consumers are still experiencing higher gas prices over last year due to the OPEC agreement, but we are not seeing substantial increases at the pump due to increased gasoline inventories and low demand across the country.

2014-2017 - Average Gas Prices - May «Read the rest of this article»

Sections: News | No Comments
 


Page 1 of 1112345...»

  • Visit Us On FacebookVisit Us On TwitterVisit Us On GooglePlusVisit Us On PinterestVisit Us On YoutubeCheck Our FeedVisit Us On Instagram
  • Personal Controls

    Archives