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NASA Spacecraft Discovers New Magnetic Process
May 9, 2018: Though close to home, the space immediately around Earth is full of hidden secrets and invisible processes. In a new discovery reported in the journal Nature, scientists working with NASA’s Magnetospheric Multiscale spacecraft—MMS—have uncovered a new type of magnetic event in our near-Earth environment by using an innovative technique to squeeze extra information out of the data.

Magnetic reconnection is one of the most important processes in the space—filled with charged particles known as plasma—around Earth. This fundamental process dissipates magnetic energy and propels charged particles, both of which contribute to a dynamic space weather system that scientists want to better understand, and even someday predict, as we do terrestrial weather. Reconnection occurs when crossed magnetic field lines snap, explosively flinging away nearby particles at high speeds. The new discovery found reconnection where it has never been seen before—in turbulent plasma.

Read more: https://www.nasa.gov/feature/goddard/2018/nasa-spacecraft-discovers-new-magnetic-process-in-turbulent-space/

Link to Nature paper: www.nature.com/articles/s41586-018-0091-5

Music credits: ‘Think Tank’ and ‘Natural Time Cycles’ by Laurent Dury from Killer Tracks

Credit: NASA’s Goddard Space Flight Center
Tai Phan (University of California, Berkeley): Lead Scientist
James Drake (University of Maryland): Scientist
Michael Shay (University of Delaware): Scientist
Jonathan Eastwood (Imperial College London): Scientist
Joy Ng (USRA): Producer
Mara Johnson-Groh (Wyle Information Systems): Writer
Tom Bridgman (GST): Data Visualizer
Lisa Poje (Freelance): Lead Animator
Josh Masters (USRA): Lead Animator
Joy Ng (USRA): Animator
Mary P. Hrybyk-Keith (TRAX International Corporation): Graphic Designer
Colby Haggerty (University of Chicago): Visualizer
Tulasi Parashar (University of Delaware): Visualizer
Aaron E. Lepsch (ADNET Systems Inc.): Technical Support

Duration: 3 minutes, 23 seconds
Release Date: May 9, 2018

+NASA Goddard

#NASA #Space #Earth #Science #Physics #MMS #Magnetic #Plasma #Spacecraft #STEM #Education #UnitedStates #Goddard #GSFC #Visualization #HD #Video
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New Magnetic Process Found in Turbulent Space
Image: In a turbulent magnetic environment, magnetic field lines become scrambled. As the field lines cross, intense electric currents (shown here as bright regions) form and eventually trigger magnetic reconnection (indicated by a flash), which is an explosive event that releases magnetic energy accumulated in the current layers and ejects high-speed bi-directional jets of electrons.
NASA | May 9, 2018: Though close to home, the space immediately around Earth is full of hidden secrets and invisible processes. In a new discovery reported in the journal Nature, scientists working with NASA’s Magnetospheric Multiscale spacecraft — MMS — have uncovered a new type of magnetic event in our near-Earth environment by using an innovative technique to squeeze extra information out of the data.

Magnetic reconnection is one of the most important processes in the space— filled with charged particles known as plasma—around Earth. This fundamental process dissipates magnetic energy and propels charged particles, both of which contribute to a dynamic space weather system that scientists want to better understand, and even someday predict, as we do terrestrial weather. Reconnection occurs when crossed magnetic field lines snap, explosively flinging away nearby particles at high speeds. The new discovery found reconnection where it has never been seen before—in turbulent plasma.

“In the plasma universe, there are two important phenomena: magnetic reconnection and turbulence,” said Tai Phan, a senior fellow at the University of California, Berkeley, and lead author on the paper. “This discovery bridges these two processes.”

Magnetic reconnection has been observed innumerable times in the magnetosphere — the magnetic environment around Earth — but usually under calm conditions. The new event occurred in a region called the magnetosheath, just outside the outer boundary of the magnetosphere, where the solar wind is extremely turbulent. Previously, scientists didn’t know if reconnection even could occur there, as the plasma is highly chaotic in that region. MMS found it does, but on scales much smaller than previous spacecraft could probe.

MMS uses four identical spacecraft flying in a pyramid formation to study magnetic reconnection around Earth in three dimensions. Because the spacecraft fly incredibly close together — at an average separation of just four-and-a-half miles, they hold the record for closest separation of any multi-spacecraft formation — they are able to observe phenomena no one has seen before. Furthermore, MMS’s instruments are designed to capture data at speeds a hundred times faster than previous missions.

Even though the instruments aboard MMS are incredibly fast, they are still too slow to capture turbulent reconnection in action, which requires observing narrow layers of fast moving particles hurled by the recoiling field lines. Compared to standard reconnection, in which broad jets of ions stream out from the site of reconnection, turbulent reconnection ejects narrow jets of electrons only a couple miles wide.

“The smoking gun evidence is to measure oppositely directed electron jets at the same time, and the four MMS spacecraft were lucky to corner the reconnection site and detect both jets”, said Jonathan Eastwood, a lecturer at Imperial College, London, and a co-author of the paper.

Crucially, MMS scientists were able to leverage the design of one instrument, the Fast Plasma Investigation, to create a technique to interpolate the data — essentially allowing them to read between the lines and gather extra data points — in order to resolve the jets.

“The key event of the paper happens in only 45 milliseconds. This would be one data point with the basic data,” said Amy Rager, a graduate student at NASA’s Goddard Space Flight Center in Greenbelt, Maryland, and the scientist who developed the technique. “But instead we can get six to seven data points in that region with this method, allowing us to understand what is happening.”

With the new method, the MMS scientists are hopeful they can comb back through existing datasets to find more of these events, and potentially other unexpected discoveries as well.

Magnetic reconnection occurs throughout the universe, so that when we learn about it around our planet — where it’s easiest for Earthlings to examine it — we can apply that information to other processes farther away. The finding of reconnection in turbulence has implications, for example, for studies on the Sun. It may help scientists understand the role magnetic reconnection plays in heating the inexplicably hot solar corona — the Sun’s outer atmosphere — and accelerating the supersonic solar wind. NASA’s upcoming Parker Solar Probe mission launches directly to the Sun in the summer of 2018 to investigate exactly those questions — and that research is all the better armed the more we understand about magnetic reconnection near home.

Credit: NASA Goddard’s Conceptual Image Lab/Lisa Poje; Simulations by: University of Chicago/Colby Haggerty; University of Delaware/Tulasi Parashar
Release Date: May 9, 2018

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#NASA #Space #Earth #Science #Physics #Magnetosphere #MMS #Magnetic #Plasma #Spacecraft #STEM #Education #UnitedStates #Goddard #GSFC #Visualization #GIF
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Pragnya IAS Academy - News Analysis

NASA launches spacecraft to study the interior of Mars for the first time.

The United States’ National Aeronautics and Space Administration on Saturday launched a spacecraft to Mars to study the deep interior of the Red Planet for the first time. The InSight mission will take six months to reach its destination, 301 million miles away.

Click the below link to read full Article:
http://www.pragnyaias.com/study%20resources/current%20affairs/NASA-launches-spacecraft-to-study-the-interior-of-Mars-for-the-first-time.htm

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NASA ScienceCasts: New Science from Jupiter
As the Juno spacecraft orbits Jupiter, new discoveries about the giant planet continue to be made.

NASA Science: http://science.nasa.gov/

Credit: NASA
Duration: 4 minutes, 47 seconds
Release Date: May 2, 2018

+NASA Jet Propulsion Laboratory
+NASA Goddard
+Lockheed Martin

#NASA #Astronomy #Science #Space #Jupiter #Atmosphere #Planet #Juno #Spacecraft #JPL #STEM #Education #HD #Video

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Jupiter Up Close | NASA Juno Mission
On April 1, 2018, NASA's Juno spacecraft successfully performed its Perijove-12 Jupiter flyby. The spacecraft's camera, JunoCam, takes spectacular close-up color images. It was built and is operated by Malin Space Science Systems in San Diego, California, USA. Many people at NASA, JPL, SwRI, and elsewhere have been, are, and will be required to plan and operate the Juno mission.

Learn more about the Juno Mission:
www.nasa.gov/mission_pages/juno/main/index.html

Credit: NASA/JPL/SwRI/MSSS/SPICE/Gerald EichstÀdt
Duration: 1 minute, 12 seconds
Release Date: April 16, 2018

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+NASA Goddard
+Lockheed Martin

#NASA #Astronomy #Science #Space #Jupiter #Atmosphere #Planet #Juno #Spacecraft #Perijove12 #JunoCam #Malin #SwRI #JPL #STEM #Education #Animation #HD #Video
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Postcard from Saturn's Ring Plane | NASA Cassini
On March 13, 2006, the Cassini spacecraft’s narrow-angle camera captured this look at Saturn and its rings, seen here nearly edge on. The frame also features Mimas and tiny Janus (above the rings), and Tethys (below the rings). “Above” and “below” the rings is mostly a matter of perspective here. All three moons and the rings orbit Saturn in roughly the same plane.

The night side of Mimas is gently illuminated by “Saturnshine,” sunlight reflected from the planet’s cloud tops.

The Cassini spacecraft ended its mission on Sept. 15, 2017.

For more information about the Cassini-Huygens mission visit: https://saturn.jpl.nasa.gov and http://www.nasa.gov/cassini

Credit: NASA/JPL-Caltech/Space Science Institute
Image Date: March 13, 2006
Release Date: May 8, 2018

+NASA Jet Propulsion Laboratory
+European Space Agency, ESA
+Carolyn Porco Fan Page
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+The Planetary Society

#NASA #Astronomy #Science #Space #Saturn #Planet #Rings #Atmosphere #Moons #Mimas #Janus #Tethys #SolarSystem #Exploration #Cassini #Spacecraft #JPL #California #UnitedStates #ESA #ASI #History #STEM #Educationï»ż
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Mars sample return | European Space Agency
Spacecraft in orbit and on Mars’s surface have made many exciting discoveries, transforming our understanding of the planet and unveiling clues to the formation of our Solar System, as well as helping us understand our home planet. The next step is to bring samples to Earth for detailed analysis in sophisticated laboratories where results can be verified independently and samples can be reanalyzed as laboratory techniques continue to improve.

Bringing Mars to Earth is no simple undertaking—it would require at least three missions from Earth and one never-been-done-before rocket launch from Mars.

A first mission, NASA’s 2020 Mars Rover, is set to collect surface samples in pen-sized canisters as it explores the Red Planet. Up to 31 canisters will be filled and readied for a later pickup—geocaching gone interplanetary.

In the same period, ESA’s ExoMars rover, which is also set to land on Mars in 2021, will be drilling up to two meters below the surface to search for evidence of life.

A second mission with a small fetch rover would land nearby and retrieve the samples in a Martian search-and-rescue operation. This rover would bring the samples back to its lander and place them in a Mars Ascent Vehicle—a small rocket to launch the football-sized container into Mars orbit.

A third launch from Earth would provide a spacecraft sent to orbit Mars and rendezvous with the sample containers. Once the samples are safely collected and loaded into an Earth entry vehicle, the spacecraft would return to Earth, release the vehicle to land in the United States, where the samples will be retrieved and placed in quarantine for detailed analysis by a team of international scientists.

Credits: NASA/ESA
Duration: 2 minutes, 37 seconds
Release Date: May 2, 2018

+European Space Agency, ESA
+NASA Jet Propulsion Laboratory
+NASA Solar System Exploration
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#NASA #Mars #Space #Science #Planet #RedPlanet #Spacecraft #Robotics #Rover #ExoMars #Mars2020 #SampleReturn #Geoscience #Geology #SolarSystem #Exploration #Europe #UnitedStates #STEM #Education #HD #Video
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Should you care about Pluto? | PBS NewsHour
We asked NASA's Alan Stern and astrobiologist David Grinspoon.
It’s been more than 12 years since NASA’s New Horizons probe left Earth on an expedition to Pluto, which at the time was the solar system’s ninth planet, and nearly three years since we saw the first images of the “planetary wonder.”

Yet there’s a bevy of details we’re only now still learning from New Horizons, according to those leading the mission—including the fact that visiting the dwarf planet almost never happened.

“There were many defeats along the way.”
In their new book “Chasing New Horizons,” mission leader Alan Stern and astrobiologist David Grinspoon divulge the most intimate accounts of the decades of planning needed for the Pluto probe.

The book recounts the mission’s emotional turbulence and seemingly endless roadblocks, such as when officials zeroed out funding for the project right when its proposal took off or when New Horizons went offline right before its flyby.

Learn about five aspects of New Horizons that you might not have known:
http://www.pbs.org/newshour/science/5-things-you-never-knew-about-the-new-horizons-mission-to-pluto

NASA New Horizons website
http://www.nasa.gov/newhorizons

New Horizons Spacecraft
Launched: Jan. 19, 2006
Pluto Flyby: July 14, 2015

Goal: Answer questions about Pluto, its moons, and Kuiper Belt objects

Credit: PBS NewsHour
Duration: 3 minutes, 56 seconds
Release Date: May 10, 2018

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#NASA #Astronomy #Space #Science #Pluto #Dwarf #Planet #NewHorizons #Spacecraft #KuiperBelt #AlanStern #JPL #SolarSystem #MSFC #JohnHopkins #JHUAPL #Exploration #STEM #Educationï»ż #HD #Video #PBSNewsHour
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Mars: Fly over Neukum crater | ESA
This video, based on images taken by the European Space Agency’s Mars Express spacecraft, showcases the 102 km wide Neukum Crater in the southern hemisphere of Mars. The crater is named for the German physicist and planetary scientist, Gerhard Neukum, one of the founders of ESA’s Mars Express mission who inspired and led the development of the high-resolution stereo camera on Mars Express.

This complex impact crater has a diverse geologic history, as indicated by various features on the crater rim and floor. Particularly striking are the dark dune fields, likely made up of volcanic material blown in and shaped by strong winds.

The crater’s shallow interior has been infilled by sediments over its history. It is also marked with two irregular depressions that may be a sign of a weaker material that has since eroded away, leaving behind some islands of more resistant material.

Over time the crater rim has undergone varying degrees of collapse, with landslides and slumped material visible in the crater walls. Many smaller craters have also overprinted the rim and pockmarked the interior since Neukum Crater was formed, highlighting its long history.

Neukum Crater is situated in Noachis Terra, one of the oldest known regions on Mars, dating back to at least 3.9 billion years.

Credit: Animation: ESA/DLR/FU Berlin, CC BY-SA 3.0 IGO; Music: Coldnoise, CC BY-SA 4.0 and Adrian Neesemann
Duration: 3 minutes, 27 seconds
Release Date: May 10, 2018

+European Space Agency, ESA
+DLR, German Aerospace Center
+Deutsches Zentrum fĂŒr Luft- und Raumfahrt (DLR)
+NASA Solar System Exploration
+The Mars Society

#NASA #ESA #Space #Mars #Astronomy #Science #Geology #Planet #Crater #Neukum #NoachisTerra #Spacecraft #MarsExpress #HRSC #Europe #DLR #GerhardNeukum #Germany #Deutschland #STEM #Education #Animation #HD #Video
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