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All Articles Tagged As: corona
A potent follow-up solar flare, which occurred Jan. 17, 2012) just days after the Sun launched the biggest coronal mass ejection seen in nearly a decade, delivered a powerful radiation punch to Earth's magnetic field despite the fact that it was aimed away from our planet.
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 | Solar storms and associated Coronal Mass Ejections can significantly erode the lunar surface according to a new set of computer simulations by NASA scientists. In addition to removing a surprisingly large amount of material from the lunar surface, this could be a major method of atmospheric loss for planets like Mars that are unprotected by a global magnetic field. ...> Full Article |
 | Like giant strands of seaweed some 32,000 miles high, material shooting up from the sun sways back and forth with the atmosphere. In the sun's corona, magnetic field ripples called Alfvén waves cause the swaying.NASA's Solar Dynamics Observatory (SDO) is now able to track the movements of this solar "seaweed" and measure how much energy is carried by the Alfvén waves. ...> Full Article |
 | NASA researchers have made use of old mathematical techniques and new insights on how CMEs travel to devise a fresh way to measure this magnetic environment in the sun's upper atmosphere, the corona. ...> Full Article |
 | If you've ever stood in front of a hot stove, watching a pot of water and waiting impatiently for it to boil, you know what it feels like to be a solar physicist. News flash: The pot is starting to boil. As 2011 unfolds, sunspots have returned and they are crackling with activity. On February 15 and again on March 9, Earth orbiting satellites detected a pair of "X-class" solar flares -- the most powerful kind of X-ray flare. ...> Full Article |
 | During a total eclipse of the sun, skywatchers are awed by the shimmering corona -- a faint glow that surrounds the sun like gossamer flower petals. The corona becomes visible only when the sun is blocked, which happens for just a few minutes during an eclipse. Now, an instrument on board NASA's Solar Dynamics Observatory, developed by Smithsonian scientists, is giving unprecedented views of the innermost corona 24 hours a day, seven days a week. ...> Full Article |
 | Twisted "ropes" of magnetic field lines erupt from the Sun and tangle
with the Earth's magnetic field. ...> Full Article |
 | Solar storms don't always travel in a straight line. But once they start heading in our direction, they can accelerate rapidly, gathering steam for a harder hit on Earth's magnetic field. ...> Full Article |
 | Yesterday afternoon, NASA's SDO web site became completely unresponsive. This is the third time in 3 weeks that the SDO image data has become unavailable to the public. What is going on? ...> Full Article |
 | Twin NASA spacecraft have provided scientists with their first view of the speed, trajectory, and three-dimensional shape of powerful explosions from the sun known as coronal mass ejections, or CMEs. This new capability will dramatically enhance scientists' ability to predict if and how these solar tsunamis could affect Earth. ...> Full Article |
 | Scientists at NASA reveal a new understanding of the mysterious mechanism responsible for heating the outer part of the solar atmosphere, the corona, to million degree temperatures. ...> Full Article |
 | New insights into solar activity have been revealed thanks to research from a group of Cambridge academics ...> Full Article |
 | Astrophysicists are having a heated debate over the wave structure of the Sun's Corona - a debate which may one day influence solar weather forecasting and the theory behind fusion reactors. ...> Full Article |
 | The appearance of a very special solar spot on the sun surface a few days ago, signalled to scientists around the world that a new solar cycle had begun. This solar spot also produced two solar blasts. ...> Full Article |
 | A new 11-year cycle of heightened solar activity, bringing with it increased risks for power grids, critical military, civilian and airline communications, GPS signals and even cell phones and ATM transactions, showed signs it was on its way late Thursday when the cycle's first sunspot appeared in the sun's Northern Hemisphere, NOAA scientists said. ...> Full Article |
 | The Sun is minimally active right now, but this quiet state of affairs won't last for long. Over the next few years, the number of solar flares and eruptions known as coronal mass ejections will increase until reaching solar maximum in 2011 or 2012. Such eruptions can impact Earth, disrupting satellites, communications, and even power grids. Some predict the next solar cycle will be the most intense in 50 years. As a result, scientists are striving to understand the mechanism behind solar eruptions in hopes of eventually being able to predict them in a space "weather forecast." ...> Full Article |
 | Tom Nichols, a mechanical engineer at Lockheed Martin in Palo Alto, works on the HMI. ...> Full Article |
 | Scientists for the first time have observed elusive oscillations in the sun's corona, known as Alfvén waves, that transport energy outward from the surface of the sun. The discovery may give researchers more insight into solar magnetic fields, eventually leading to a better understanding of how the sun affects Earth's atmosphere and the entire solar system.
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