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Topic: Ice

NASA Study of Interstellar Object “Oumuamua” helps us understand Planet Formation

 

Written by Jeanette Kazmierczak
NASA’s Goddard Space Flight Center

NASA - National Aeronautics and Space AdministrationGreenbelt, MD – The first interstellar object ever seen in our solar system, named ‘Oumuamua, is giving scientists a fresh perspective on the development of planetary systems. A new study by a team including astrophysicists at NASA’s Goddard Space Flight Center in Greenbelt, Maryland, calculated how this visitor from outside our solar system fits into what we know about how planets, asteroids and comets form. 

On October 19th, 2017, astronomers working with the NASA-funded Panoramic Survey Telescope and Rapid Response System (Pan-STARRS1) at the University of Hawaii spotted an object zipping through our solar system at a very high speed. Scientists at the Minor Planet Center, funded by NASA’s Near-Earth Object Observations Program, confirmed it was the first object of interstellar origin that we’ve seen.

An illustration of ‘Oumuamua, the first object we’ve ever seen pass through our own solar system that has interstellar origins. (European Southern Observatory/M. Kornmesser)

An illustration of ‘Oumuamua, the first object we’ve ever seen pass through our own solar system that has interstellar origins. (European Southern Observatory/M. Kornmesser)

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NASA to launch Two Satellites focused on studying Earth’s Frozen Areas

 

Written by Patrick Lynch
NASA’s Earth Science News Team

NASA - National Aeronautics and Space AdministrationWashington, D.C. – In 2018, NASA will intensify its focus on one of the most critical but remote parts of our changing planet with the launch of two new satellite missions and an array of airborne campaigns.

The space agency is launching these missions at a time when decades of observations from the ground, air, and space have revealed signs of change in Earth’s ice sheets, sea ice, glaciers, snow cover and permafrost. Collectively, scientists call these frozen regions of our planet the “cryosphere.”

In 2018, NASA is scheduled to launch two new satellite missions and conduct an array of field research that will enhance our view of Earth's ice sheets, glaciers, sea ice, snow cover, and permafrost. Collectively, these frozen regions are known as the "cryosphere." (NASA)

In 2018, NASA is scheduled to launch two new satellite missions and conduct an array of field research that will enhance our view of Earth’s ice sheets, glaciers, sea ice, snow cover, and permafrost. Collectively, these frozen regions are known as the “cryosphere.” (NASA)

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NASA’s Dawn Spacecraft observations show dwarf planet Ceres continues to change

 

NASA’s Jet Propulsion Laboratory

NASA - National Aeronautics and Space AdministrationPasadena, CA – Observations of Ceres have detected recent variations in its surface, revealing that the only dwarf planet in the inner solar system is a dynamic body that continues to evolve and change.

NASA’s Dawn mission has found recently exposed deposits that give us new information on the materials in the crust and how they are changing, according to two papers published March 14th in Science Advances that document the new findings.

Observations obtained by the visible and infrared mapping spectrometer (VIR) on the Dawn spacecraft previously found water ice in a dozen sites on Ceres.

This view from NASA's Dawn mission shows where ice has been detected in the northern wall of Ceres' Juling Crater, which is in almost permanent shadow. (NASA/JPL-Caltech/UCLA/MPS/DLR/IDA/ASI/INAF)

This view from NASA’s Dawn mission shows where ice has been detected in the northern wall of Ceres’ Juling Crater, which is in almost permanent shadow. (NASA/JPL-Caltech/UCLA/MPS/DLR/IDA/ASI/INAF)

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NASA’s Mars Exploration Rover Opportunity continues to make discoveries on Mars

 

NASA Headquarters

NASA - National Aeronautics and Space AdministrationWashington, D.C. – NASA’s Mars Exploration Rover Opportunity keeps providing surprises about the Red Planet, most recently with observations of possible “rock stripes.”

The ground texture seen in recent images from the rover resembles a smudged version of very distinctive stone stripes on some mountain slopes on Earth that result from repeated cycles of freezing and thawing of wet soil. But it might also be due to wind, downhill transport, other processes or a combination.

Textured rows on the ground in this portion of "Perseverance Valley" are under investigation by NASA's Mars Exploration Rover Opportunity, which used its Navigation Camera to take the component images of this downhill-looking scene. The rover reaches its 5,000th Martian day, or sol, on Feb. 16, 2018. (NASA/JPL-Caltech)

Textured rows on the ground in this portion of “Perseverance Valley” are under investigation by NASA’s Mars Exploration Rover Opportunity, which used its Navigation Camera to take the component images of this downhill-looking scene. The rover reaches its 5,000th Martian day, or sol, on Feb. 16, 2018. (NASA/JPL-Caltech)

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Dodging the Roadkill: Cabin Fever

 

Dodging the Roadkill - A Biker's JourneyClarksville, TN – I’ve been dealing with a major winter snowstorm here in Middle Tennessee. We’ve had a couple of inches of ice, and now a few inches of snow.

It’s treacherous.

My friends who actually LIVE in harsh winter weather, just sit back a chuckle at us southerners, and I don’t blame them. We’re just not built for this.

That means I’m dealing with cabin fever. I’ve spent the entire day watching YouTube videos about motorcycles, motorcycle trips and various motorcycle infomercials. Now I want to ride. But can’t!

Winter Snowstorm

Winter Snowstorm

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NASA’s Mars Reconnaissance Orbiter discovers eroding slopes with exposed Ice

 

Written by Laurie Cantillo / Dwayne Brown
NASA Headquarters

NASA - National Aeronautics and Space AdministrationWashington, D.C. – Researchers using NASA’s Mars Reconnaissance Orbiter (MRO) have found eight sites where thick deposits of ice beneath Mars’ surface are exposed in faces of eroding slopes.

These eight scarps, with slopes as steep as 55 degrees, reveal new information about the internal layered structure of previously detected underground ice sheets in Mars’ middle latitudes.

The ice was likely deposited as snow long ago.

A cross-section of underground ice is exposed at the steep slope that appears bright blue in this enhanced-color view from the HiRISE camera on NASA's Mars Reconnaissance Orbiter. The scene is about 550 yards wide. The scarp drops about 140 yards from the level ground in the upper third of the image. (NASA/JPL-Caltech/UA/USGS)

A cross-section of underground ice is exposed at the steep slope that appears bright blue in this enhanced-color view from the HiRISE camera on NASA’s Mars Reconnaissance Orbiter. The scene is about 550 yards wide. The scarp drops about 140 yards from the level ground in the upper third of the image. (NASA/JPL-Caltech/UA/USGS)

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Clarksville Police announces Winter Weather accident numbers

 

Clarksville Police Department - CPDClarksville, TN – Clarksville Police say there have been no reports of major road closures Saturday morning but, that doesn’t mean the roads are totally clear or that it is a good idea to be on the roadway, unless you absolutely have to be.

The road crews are working hard to clear the over 700 plus miles of road in Clarksville-Montgomery County, but there are still a lot of icy and treacherous road conditions.

A lot of roads in Clarksville-Montgomery County remain hazardous today.

A lot of roads in Clarksville-Montgomery County remain hazardous today.

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City of Clarksville Departments work the Winter Storm

 

Clarksville Police report 22 vehicle crashes since 5:00am, Friday

City of Clarksville - Clarksville, TNClarksville, TN – City of Clarksville Government offices were closed Friday because of the winter storm that brought ice, snow and hazardous travel conditions to Middle Tennessee.

But the City’s street, transportation and public safety departments remained fully staffed and engaged to provide services and protection to Clarksville residents.

Clarksville City Hall

Clarksville City Hall

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Dangerous Travel Conditions Tonight for Clarksville-Montgomery County due to Snow and Ice

 

National Weather ServiceNashville, TN – The National Weather Service reports that as a result of the ice and snow that fell across Clarksville-Montgomery County and Middle Tennessee today, dangerous travel conditions have developed tonight, especially along and north of I-40 where the most ice and snow fell.

With temperatures falling into the teens overnight, any snow, ice, or water remaining on roadways will freeze creating very hazardous driving conditions. Dozens of vehicle accidents have already occurred today with portions of I-40, I-24, and I-65 west and north of Nashville closed.

Hazardous road conditions exist tonight across Clarksville-Montgomery County.

Hazardous road conditions exist tonight across Clarksville-Montgomery County.

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Montgomery County Government offices close Friday

 

Montgomery County Government TennesseeMontgomery County, TN – Montgomery County Offices will be closed today, Friday, January 12th, 2018 due to Winter Storm in the area.

Road conditions are expected to worsen all day.

Please be safe everyone.

Office Closed

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