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Topic: Indian Ocean

NASA excited about Apophis Asteroid passing by Earth in 2029

 

NASA - National Aeronautics and Space AdministrationPasadena, CA – NASA says that a speck of light will streak across the sky, getting brighter and faster on April 13th, 2029. At one point it will travel more than the width of the full Moon within a minute and it will get as bright as the stars in the Little Dipper.

But it won’t be a satellite or an airplane – it will be a 1,100-foot-wide (340-meter-wide) near-Earth asteroid called 99942 Apophis that will cruise harmlessly by Earth, about 19,000 miles (31,000 kilometers) above the surface. That’s within the distance that some of our spacecraft that orbit Earth.

The international asteroid research community couldn’t be more excited.

This illustration shows the distance between the Apophis asteroid and Earth at the time of the asteroid's closest approach. The blue dots are the many man-made satellites that orbit our planet, and the pink represents the International Space Station. (NASA/JPL-Caltech)

This illustration shows the distance between the Apophis asteroid and Earth at the time of the asteroid’s closest approach. The blue dots are the many man-made satellites that orbit our planet, and the pink represents the International Space Station. (NASA/JPL-Caltech)

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NASA reports Cygnus Cargo Craft brings Research, Supplies to International Space Station

 

NASA Headquarters 

NASA - National Aeronautics and Space AdministrationWashington, D.C. – NASA says that after its capture on April 19th, 2019 at 4:28am CDT, the Northrop Grumman Cygnus spacecraft was bolted into place on the International Space Station’s Earth-facing port of the Unity module at 6:31am At the time of installation, Cygnus was flying 255 miles above the Indian Ocean just south of Singapore.

Cygnus will remain at the space station until July 23rd, when the spacecraft will depart the station, deploy NanoRacks customer CubeSats, then have an extended mission of nine months before it will dispose of several tons of trash during a fiery reentry into Earth’s atmosphere.

International Space Station Configuration. Five spaceships are docked at the space station including Northrop Grumman’s Cygnus space freighter and Russia’s Progress 71 and 72 resupply ships and the Soyuz MS-11 and MS-12 crew ships. (NASA)

International Space Station Configuration. Five spaceships are docked at the space station including Northrop Grumman’s Cygnus space freighter and Russia’s Progress 71 and 72 resupply ships and the Soyuz MS-11 and MS-12 crew ships. (NASA)

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NASA reports small Asteroid burns up over Southern Africa, Saturday

 

NASA Headquarters

NASA - National Aeronautics and Space AdministrationWashington, D.C. – A boulder-sized asteroid designated 2018 LA was discovered Saturday morning, June 2nd, 2018 and was determined to be on a collision course with Earth, with impact just hours away.

Because it was very faint, the asteroid was estimated to be only about 6 feet (2 meters) across, which is small enough that it was expected to safely disintegrate in Earth’s atmosphere. Saturday’s asteroid was first discovered by the NASA-funded Catalina Sky Survey, located near Tucson and operated by the University of Arizona.

Artist's concept of a near-Earth object. (NASA/JPL-Caltech)

Artist’s concept of a near-Earth object. (NASA/JPL-Caltech)

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NASA reports new study sheds light on slowdown of Global Warming

 

Written by Alan Buis
NASA’s Jet Propulsion Laboratory

NASA - National Aeronautics and Space AdministrationPasadena, CA – A new multi-institutional study of the temporary slowdown in the global average surface temperature warming trend observed between 1998 and 2013 concludes the phenomenon represented a redistribution of energy within the Earth system, with Earth’s ocean absorbing the extra heat.

The phenomenon was referred to by some as the “global warming hiatus.” Global average surface temperature, measured by satellites and direct observations, is considered a key indicator of climate change.

A new multi-institutional study of the latest research into the temporary slowdown in the global average surface temperature increase seen between 1998 and 2013 concludes it represented a redistribution of heat/energy within the oceans. (Flickr user Brian Richardson, CC by 2.0)

A new multi-institutional study of the latest research into the temporary slowdown in the global average surface temperature increase seen between 1998 and 2013 concludes it represented a redistribution of heat/energy within the oceans. (Flickr user Brian Richardson, CC by 2.0)

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NASA study reveals Oceans Temperature Rise Slowed

 

Written by Alan Buis
NASA’s Jet Propulsion Laboratory

NASA - National Aeronautics and Space AdministrationPasadena, CA – A new NASA study of ocean temperature measurements shows that in recent years, extra heat from greenhouse gases has been trapped in the waters of the Pacific and Indian oceans. Researchers say this shifting pattern of ocean heat accounts for the slowdown in the global surface temperature trend observed during the past decade.

Researchers Veronica Nieves, Josh Willis and Bill Patzert of NASA’s Jet Propulsion Laboratory, Pasadena, California, found a specific layer of the Indian and Pacific oceans between 300 and 1,000 feet (100 and 300 meters) below the surface has been accumulating more heat than previously recognized.

An Argo float, foreground. The new study included direct measurements of ocean temperatures from the global array of 3,500 Argo floats and other ocean sensors. (Argo program, Germany/Ifremer)

An Argo float, foreground. The new study included direct measurements of ocean temperatures from the global array of 3,500 Argo floats and other ocean sensors. (Argo program, Germany/Ifremer)

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Tennessee Department of Health urges Travelers to Protect Themselves from Mosquitoes

 

Chikungunya Virus Disease Spread by Bites

Tennessee Department of Health - TDOHNashville, TN – The Tennessee Department of Health is reminding vacation and business travelers about the importance of protecting themselves from mosquitoes that may transmit chikungunya virus and other mosquito-borne illnesses like dengue.

The first confirmed case of chikungunya virus disease in Tennessee occurred in 2014; since then 42 additional cases have been documented, all involving travel outside the state.

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Tennessee Department of Health is raising Awareness about Chikungunya

 

Tennessee Department of Health - TDOHNashville, TN – The Tennessee Department of Health is investigating the first potential cases of chikungunya in the state. Multiple people from Tennessee recently traveled to the Caribbean, where the illness is now a widespread epidemic with over 100,000 suspected cases.

Some of the recent travelers from Tennessee now have symptoms of the illness.

Chikungunya is transmitted by daytime biting mosquitoes.

Chikungunya is transmitted by daytime biting mosquitoes.

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NASA reports Jupiter’s moon Europa once spun off kilter

 

NASA - National Aeronautics and Space AdministrationPasadena, CA – By analyzing the distinctive cracks lining the icy face of Europa, NASA scientists found evidence that this moon of Jupiter likely spun around a tilted axis at some point.

Europa’s tilt could influence calculations of how much of the moon’s history is recorded in its frozen shell, how much heat is generated by tides in its ocean, and even how long the ocean has been liquid.

This view of Jupiter's moon Europa features several regional-resolution mosaics overlaid on a lower resolution global view for context. The regional views were obtained during several different flybys of the moon by NASA's Galileo mission, and they stretch from high northern to high southern latitudes. Prominent here are the long, arcuate (or arc-shaped) and linear markings called lineae (Latin for strings or threads). (NASA/JPL-Caltech/University of Arizona )

This view of Jupiter’s moon Europa features several regional-resolution mosaics overlaid on a lower resolution global view for context. The regional views were obtained during several different flybys of the moon by NASA’s Galileo mission, and they stretch from high northern to high southern latitudes. Prominent here are the long, arcuate (or arc-shaped) and linear markings called lineae (Latin for strings or threads). (NASA/JPL-Caltech/University of Arizona )

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Europe Hammered by Winter, Is North America Next?

 

Written by Dauna Coulter
Science at NASA

NASA - National Aeronautics and Space AdministrationPasadena, CA – For the first half of this year’s winter, the big news was warm temperatures and lack of snow. Ski resorts were covered in bare dirt, while January temperatures in southern California topped July highs.

Then, out of the blue, Europe got clobbered: Over the past two weeks, temperatures in Eastern Europe have nose-dived to -30 degrees Celsius (-22 degrees Fahrenheit). Blizzards and the bone-chilling cold have resulted in the deaths of over 550 people so far, with rooftop-high snow drifts trapping tens of thousands of villagers in their homes and cutting off access to entire towns. It has even snowed as far south as North Africa.

This map shows temperature anomalies for Europe and western Russia from January 25th to February 1st, 2012, compared to temperatures for the same dates from 2001 to 2011. The anomalies are based on land surface temperatures observed by the MODIS instrument on NASA’s Terra satellite.

This map shows temperature anomalies for Europe and western Russia from January 25th to February 1st, 2012, compared to temperatures for the same dates from 2001 to 2011. The anomalies are based on land surface temperatures observed by the MODIS instrument on NASA’s Terra satellite.

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Aquarius Yields NASA’s First Global Map of Ocean Salinity

 

Written by Alan Buis
Jet Propulsion Laboratory

NASA - National Aeronautics and Space AdministrationPasadena, CA – NASA’s new Aquarius instrument has produced its first global map of the salinity of the ocean surface, providing an early glimpse of the mission’s anticipated discoveries.

Aquarius, which is aboard the Aquarius/SAC-D (Satélite de Aplicaciones Científicas) observatory, is making NASA’s first space observations of ocean surface salinity variations — a key component of Earth’s climate. Salinity changes are linked to the cycling of freshwater around the planet and influence ocean circulation.

“Aquarius’ salinity data are showing much higher quality than we expected to see this early in the mission,” said Aquarius Principal Investigator Gary Lagerloef of Earth & Space Research in Seattle. “Aquarius soon will allow scientists to explore the connections between global rainfall, ocean currents and climate variations.”

NASA's new Aquarius instrument has produced its first global map of the salinity, or saltiness, of Earth's ocean surface, providing an early glimpse of the mission's anticipated discoveries. Its rich tapestry of global salinity patterns demonstrates Aquarius' ability to resolve large-scale salinity distribution features clearly and with sharp contrast. The map provides a much better picture of ocean surface salinity than the Aquarius science team expected to have this early in the mission. (NASA/GSFC/JPL-Caltech)

NASA's new Aquarius instrument has produced its first global map of the salinity, or saltiness, of Earth's ocean surface, providing an early glimpse of the mission's anticipated discoveries. Its rich tapestry of global salinity patterns demonstrates Aquarius' ability to resolve large-scale salinity distribution features clearly and with sharp contrast. The map provides a much better picture of ocean surface salinity than the Aquarius science team expected to have this early in the mission. (NASA/GSFC/JPL-Caltech)

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