Coronal Mass Ejection

Coronal Mass Ejection
Coronal Mass Ejection

Coronal mass ejection

A coronal mass ejection (CME) is a significant release of plasma and magnetic field from the solar corona. They often follow solar flares and are normally present during a solar prominence eruption. The plasma is released into the solar wind, and can be observed in coronagraph imagery.

Coronal mass ejections are often associated with other forms of solar activity, but a broadly accepted theoretical understanding of these relationships has not been established. CMEs most often originate from active regions on the Sun’s surface, such as groupings of sunspots associated with frequent flares. Near solar maxima, the Sun produces about three CMEs every day, whereas near solar minima, there is about one CME every five days.

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Coronal mass ejections release large quantities of matter and electromagnetic radiation into space above the Sun’s surface, either near the corona (sometimes called a solar prominence), or farther into the planetary system, or beyond (interplanetary CME). The ejected material is a magnetized plasma consisting primarily of electrons and protons. While solar flares are very fast (being electromagnetic radiation), CMEs are relatively slow.

Coronal mass ejections are associated with enormous changes and disturbances in the coronal magnetic field. They are usually observed with a white-light coronagraph.

Impact on Earth

When the ejection is directed towards Earth and reaches it as an interplanetary CME (ICME), the shock wave of traveling mass causes a geomagnetic storm that may disrupt Earth’s magnetosphere, compressing it on the day side and extending the night-side magnetic tail. When the magnetosphere reconnects on the nightside, it releases power on the order of terawatt scale, which is directed back toward Earth’s upper atmosphere.

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Solar energetic particles can cause particularly strong aurorae in large regions around Earth’s magnetic poles. These are also known as the Northern Lights (aurora borealis) in the northern hemisphere, and the Southern Lights (aurora australis) in the southern hemisphere.

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Coronal mass ejections, along with solar flares of other origin, can disrupt radio transmissions and cause damage to satellites and electrical transmission line facilities, resulting in potentially massive and long-lasting power outages.

To learn more, click here.

Image credit: Alex Conu 

Animation: Science Channel & NASA/Goddard

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NASA-funded Website Lets Public Search for New Nearby Worlds

NASA - NEOWISE Mission logo. Feb. 15, 2017 NASA is inviting the public to help search for possible undiscovered worlds in the outer reaches of our solar system and in neighboring interstellar space. A new website, called Backyard Worlds: Planet 9, lets everyone participate in the search by viewing brief movies made from images captured by NASA’s Wide-field Infrared Survey Explorer (WISE) mission. The movies highlight objects that have gradually moved across the sky.

Join the Search for New Nearby World

Video above: Join the search for new worlds in the outer reaches of our solar system and in nearby interstellar space at Backyard Worlds: Planet 9. Video Credits: NASA’s Goddard Space Flight Center Conceptual Image Lab/Krystofer D.J. Kim. “There are just over four light-years between Neptune and Proxima Centauri, the nearest star, and much of this vast territory is unexplored,” said lead researcher Marc Kuchner, an astrophysicist at NASA’s Goddard Space Flight Center in Greenbelt, Maryland. “Because there’s so little sunlight, even large objects in that region barely shine in visible light. But by looking in the infrared, WISE may have imaged objects we otherwise would have missed.” WISE scanned the entire sky between 2010 and 2011, producing the most comprehensive survey at mid-infrared wavelengths currently available. With the completion of its primary mission, WISE was shut down in 2011. It was then reactivated in 2013 and given a new mission assisting NASA’s efforts to identify potentially hazardous near-Earth objects (NEOs), which are asteroids and comets on orbits that bring them into the vicinity of Earth’s orbit. The mission was renamed the Near-Earth Object Wide-field Infrared Survey Explorer (NEOWISE). 

Image above: This artist’s concept illustrates a close-up view of a cool brown dwarf. Objects like this, drifting just beyond our solar system, have been imaged by NASA’s Wide-field Infrared Survey Explorer and could be discovered by Backyard Worlds: Planet 9. Image Credits: NASA/JPL-Caltech. The new website uses the data to search for unknown objects in and beyond our own solar system. In 2016, astronomers at Caltech in Pasadena, California, showed that several distant solar system objects possessed orbital features indicating they were affected by the gravity of an as-yet-undetected planet, which the researchers nicknamed “Planet Nine.” If Planet Nine — also known as Planet X — exists and is as bright as some predictions, it could show up in WISE data. The search also may discover more distant objects like brown dwarfs, sometimes called failed stars, in nearby interstellar space. “Brown dwarfs form like stars but evolve like planets, and the coldest ones are much like Jupiter,” said team member Jackie Faherty, an astronomer at the American Museum of Natural History in New York. “By using Backyard Worlds: Planet 9, the public can help us discover more of these strange rogue worlds.”

Animation above: A previously cataloged brown dwarf named WISE 0855−0714 shows up as a moving orange dot (upper left) in this loop of WISE images spanning five years. By viewing movies like this, anyone can help discover more of these objects. Animation Credits: NASA/WISE. Unlike more distant objects, those in or closer to the solar system appear to move across the sky at different rates. The best way to discover them is through a systematic search of moving objects in WISE images. While parts of this search can be done by computers, machines are often overwhelmed by image artifacts, especially in crowded parts of the sky. These include brightness spikes associated with star images and blurry blobs caused by light scattered inside WISE’s instruments. Backyard Worlds: Planet 9 relies on human eyes because we easily recognize the important moving objects while ignoring the artifacts. It’s a 21st-century version of the technique astronomer Clyde Tombaugh used to find Pluto in 1930, a discovery made 87 years ago this week. On the website, people around the world can work their way through millions of “flipbooks,” which are brief animations showing how small patches of the sky changed over several years. Moving objects flagged by participants will be prioritized by the science team for follow-up observations by professional astronomers. Participants will share credit for their discoveries in any scientific publications that result from the project. “Backyard Worlds: Planet 9 has the potential to unlock once-in-a-century discoveries, and it’s exciting to think they could be spotted first by a citizen scientist,” said team member Aaron Meisner, a postdoctoral researcher at the University of California, Berkeley, who specializes in analyzing WISE images.

NEOWISE spacecraft. Image Credit: NASA

Backyard Worlds: Planet 9 is a collaboration between NASA, UC Berkeley, the American Museum of Natural History in New York, Arizona State University, the Space Telescope Science Institute in Baltimore, and Zooniverse, a collaboration of scientists, software developers and educators who collectively develop and manage citizen science projects on the internet. NASA’s Jet Propulsion Laboratory in Pasadena, California, manages and operates WISE for NASA’s Science Mission Directorate. The WISE mission was selected competitively under NASA’s Explorers Program managed by the agency’s Goddard Space Flight Center. The science instrument was built by the Space Dynamics Laboratory in Logan, Utah. The spacecraft was built by Ball Aerospace & Technologies Corp. in Boulder, Colorado. Science operations and data processing take place at the Infrared Processing and Analysis Center at Caltech, which manages JPL for NASA. For more information about Backyard Worlds: Planet 9, visit: http://backyardworlds.org For more information about NASA’s WISE mission, visit: http://www.nasa.gov/wise Related links: NEOWISE: http://www.nasa.gov/mission_pages/neowise/main/index.html Zooniverse: https://www.zooniverse.org/ Images (mentioned), Animation (mentioned), Video (mentioned), Text, Credits: NASA’s Goddard Space Flight Center, by Francis Reddy/Rob Garner. Greetings, Orbiter.ch Full article

NASA’s Best Photographs Of 2016
NASA’s Best Photographs Of 2016
NASA’s Best Photographs Of 2016
NASA’s Best Photographs Of 2016
NASA’s Best Photographs Of 2016
NASA’s Best Photographs Of 2016
NASA’s Best Photographs Of 2016
NASA’s Best Photographs Of 2016
NASA’s Best Photographs Of 2016
NASA’s Best Photographs Of 2016

NASA’s Best Photographs of 2016

This Is A Real, Unprocessed Photo From Cassini Spacecraft.

This is a real, unprocessed photo from Cassini spacecraft.

Keep reading

for all the space ppl out there, nasa is doing a live feed of earth in space on youtube rn! 👀💫🌍

The Launch Of The Scout Launch Vehicle At The Wallops Flight Facility, VA … #Astronomy #Space #Spacegram

The launch of the Scout launch vehicle at the Wallops Flight Facility, VA … #Astronomy #Space #Spacegram #Spaceflight #Nasa #ESA #ASI #Astronaut #Universe #Cosmos #Sky #Earth #Nebula #Galaxy #Love #MarsGeneration #TheMarsGeneration #MoonColonist #Moon #Astro_Lorenzo

Nasa discover new solar system with ‘best chance yet of alien life’ yet - LIVE
Life may have evolved on at least three planets in a newly discovered solar system just 39 light years from Earth, NASA has announced.

⚠️️ BREAKTHROUGH  ⚠️️ 

Nasa is currently livestreaming a conference about the discovery of a new solar system !

“Astronomers have detected no less than seven Earth-sized worlds orbiting a cool dwarf star known as TRAPPIST-1.The six inner planets lie in a temperate zone where surface temperatures range from zero to 100C.

Of these, at least three are thought to be capable of having oceans, increasing the likelihood of life.

No other star system known contains such a large number of Earth-sized and probably rocky planets.”

I AM SO EXCITED

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Kristina | 17 | space and scifi lover | side blog We are nothing but space dust trying to find its way back to stars

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