Eruptive events on the sun can be wildly different. Some come just with a solar flare, some with an additional ejection of solar material called a coronal mass ejection (CME), and some with complex moving structures in association ...
Space Exploration
Feb 20, 2013
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Why is the Sun's million-degree corona, or outermost atmosphere, so much hotter than the Sun's surface? This question has baffled astronomers for decades. Today, a team led by Paola Testa of the Harvard-Smithsonian Center ...
Space Exploration
Oct 16, 2014
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Solar flares and coronal mass ejections (CME) are two of the most energetic processes in the solar system, showering the Earth's magnetic field with billions of tons of highly energetic plasma gas, potentially disrupting ...
Astronomy
May 10, 2023
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A dramatic magnetic power struggle at the Sun's surface lies at the heart of solar eruptions, new research using NASA data shows. The work highlights the role of the Sun's magnetic landscape, or topology, in the development ...
Space Exploration
Feb 23, 2018
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As Comet ISON heads toward its closest approach to the sun—known as perihelion—on Nov. 28, 2013, scientists have been watching through many observatories to see if the comet has already broken up under the intense heat ...
Space Exploration
Nov 27, 2013
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NASA's Solar Dynamics Observatory came across an oddity that the spacecraft has rarely observed before: a dark filament encircling an active region (Oct. 29-31, 2017). Solar filaments are clouds of charged particles that ...
Space Exploration
Nov 9, 2017
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A coronal mass ejection, or CME, surged off the side of the sun on May 9, 2014, and NASA's newest solar observatory caught it in extraordinary detail. This was the first CME observed by the Interface Region Imaging Spectrograph, ...
Space Exploration
May 31, 2014
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This video shows a simulation of the space environment all the way out to Pluto in the months surrounding New Horizons' July 2015 flyby. At the time, scientists at NASA's Goddard Space Flight Center in Greenbelt, Maryland, ...
Space Exploration
Dec 9, 2015
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These 366 images of the sun were made by ESA's Proba-2 satellite in 2020.
Space Exploration
Jan 7, 2021
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On the night of Oct. 8, 2015, a photographer in Harstad, Norway captured this image of the dancing northern lights. Auroras are created when fast-moving, magnetic solar material strikes Earth's magnetic bubble, the magnetosphere. ...
Space Exploration
Oct 12, 2015
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