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RE: ALL ABOUT COSMIC CYCLES AND AGES
8/25/2017 4:22:59 PM
Happy Birthday, my good community Friend!

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Luis Miguel Goitizolo

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RE: ALL ABOUT COSMIC CYCLES AND AGES
8/25/2017 6:42:27 PM
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Thank you so much, Jan.

Happy Birthday, my good community Friend!

"Choose a job you love and you will not have to work a day in your life" (Confucius)

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Luis Miguel Goitizolo

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RE: ALL ABOUT COSMIC CYCLES AND AGES
4/13/2018 10:25:43 AM

EARTH'S MYSTERIOUS SECOND MAGNETIC FIELD REVEALED IN STUNNING NEW SWARM IMAGES

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Updated | You may know that the Moon is behind our oceans’ tides, drawing water to and from coasts with its gravitational pull. You might not know that this movement generates a weak magnetic field. The huge bodies of electrically-conductive salt water create a magnetic signal as they ebb and flow.

Now, a constellation of satellites has mapped this elusive magnetic field in impressive detail. Dubbed “Swarm,” the European Space Agency mission results stunned scientists at the European Geosciences Union General Assembly 2018 in Vienna, Austria.

Elusive magnetic field

The field has been incredibly difficult to track because it is so small. "It's a really tiny magnetic field. It's about 2-2.5 nanotesla at satellite altitude, which is about 20,000 times weaker than the Earth's global magnetic field," Nils Olsen, head of geomagnetism at the Technical University of Denmark, told BBC News.

A screenshot of the ESA's magnetic tides map.ESA

Hot, swirling liquid iron in the Earth's outer core generates the vast majority of its magnetism. The ocean field, along with other factors like magnetized rocks in the Earth's crust, makes a small but important contribution to the overall magnetic signal of the planet.

This newly-tracked magnetic field, Olson said in a statement, “gives us a truly global picture of how the ocean flows at all depths.”

Mysterious electrical activity inside Earth

Earth, as pictured from the NASA/NOAA Suomi National Polar-orbiting Partnership spacecraft on April 9, 2015.NASA

It can help scientists understand more about climate change, and even electrical activity deep within Earth's interior. “Since oceans absorb heat from the air, tracking how this heat is being distributed and stored, particularly at depth, is important for understanding our changing climate," Olson explained.

Read more: Earth’s Magnetic Field Is about to Flip—and a ‘Giant Lava Lamp’ in Earth’s Core Is The Driving Force

The magnetic signature of the tides causes a "weak magnetic response" deep below the sea, Olson added. Swarm will help scientists understand more about the mysterious electrical goings-on of our planet's lithosphere and upper mantle. Electromagnetic data from deep inside Earth gives scientists vital information about its structure and about the tectonic activity that drives earthquakes and volcanic eruptions.

This article has been updated to include more information about the sources of Earth's magnetic signal.


(newsweek)

"Choose a job you love and you will not have to work a day in your life" (Confucius)

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Luis Miguel Goitizolo

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RE: ALL ABOUT COSMIC CYCLES AND AGES
4/14/2018 9:27:10 AM

NASA’S 4K MOON VIDEO TOUR WILL BLOW YOU AWAY

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NASA has released a spectacular 4K resolution video tour of the Moon based on data and images collected by the Lunar Reconnaissance Orbiter (LRO), which has been orbiting our only natural satellite since 2009.

The tour visits numerous sites of interest (detailed individually in this Tumblr post) that LRO has helped to shed light on. Many of these are on the Moon’s near-side and are familiar to both professional and amateur astronomers alike, while others can only be clearly seen from space.

The LRO data is helping NASA plan future lunar missions, while also providing new insights into the moon’s structure and evolution.

One stop on the tour is the Moon’s North Pole. Using LRO data, scientists have identified mountain peaks and crater rims in this region that have consistent sun exposure. These areas could be ideal sites to place solar panels for the support of future human missions.

Another feature visited by the tour is the Aristarchus Plateau, which contains a crater so bright it is actually visible with the naked eye from Earth. This region is covered in rocks from volcanic eruptions and marked by river-like structures created by ancient lava flows. It is particularly interesting to researchers, not only as a potential landing site, but also because it serves as a record of the Moon’s volcanic history.

The tour also stops by the Texas-sized Orientale Basin—the best-preserved impact structure on the Moon. Topography data from LRO combined with gravity measurements from NASA’s GRAIL spacecraft has revealed the structure below the basin, helping scientists understand the geological consequences of large impacts.

Image of the Moon taken by NASA's Lunar Reconnaissance Orbiter (LRO).NASA

“LRO was designed as a one-year mission,” NASA wrote in the Tumblr post. “Thanks to its many orbits around the Moon, we have been able to expand on lunar science from the Apollo missions while paving the way for future lunar exploration. And as the mission continues to gather data, it will provide us with many more opportunities to take a tour of our Moon.”

(newsweek)

"Choose a job you love and you will not have to work a day in your life" (Confucius)

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