Solar Wind

A flow of atomic nuclei and electrons from the Sun that travels at an average speed of about two million miles per hour (400 km/s).


Facts and Figures The biggest, farthest and fastest in the...

Radio Programs

Moon, Saturn, and Antares A stellar weight-loss plan Saturday, August 22, 2015
Unpredictable Sun Predicting our unpredictable Sun Wednesday, April 29, 2015
Spring Storm Making a mess of Easter Sunday Tuesday, March 24, 2015
Distant Borders Crossing a distant border Monday, May 19, 2014
Young-Sun Paradox II A weight-loss plan for the Sun Friday, June 7, 2013
More Sirius A stellar weight-loss program Sunday, December 30, 2012
Storm Probes Plunging into the danger zone Thursday, December 20, 2012
Mariner 2 Pioneering a path to another world Thursday, December 13, 2012
Future Neighbor A future close neighbor to the Sun Thursday, June 14, 2012
Sun Power Weathering bouts of space weather Wednesday, June 13, 2012
Interstellar Skies Looking for clear interstellar skies Tuesday, November 15, 2011
Near the Edge Nearing the edge of the solar system Monday, November 14, 2011
Weather Forecasts Expanding the daily weather forecast Saturday, August 6, 2011
Space Weather Nasty weather from beyond Earth Friday, August 5, 2011
Moon and Jupiter Shielding an entire planet Saturday, May 28, 2011
Quiet Sun II A calm and peaceful Sun Sunday, August 22, 2010
Quiet Sun The Sun stays unusually calm Saturday, August 21, 2010
Weather "Weathering" the solar system Monday, July 12, 2010
Mars and Regulus II Stripping away the Martian atmosphere Monday, June 7, 2010
Uranus III Heating up a planet's atmosphere Thursday, June 3, 2010
Venus and Mercury II Tailing a "leaky" planet Tuesday, April 6, 2010
Space Weathering IV Big results on a small scale Thursday, February 18, 2010
Space Weathering Digging into the lunar surface Monday, February 15, 2010
Solar Dynamics Observatory Keeping an eye on the weather Thursday, February 4, 2010
Martian Air Pondering the fate of the Martian atmosphere Thursday, January 28, 2010

Featured Images

A brilliant aurora from the International Space Station
Fiery Sky Wednesday, January 21, 2015
One of the first images from IRIS, a new Sun-watching satellite
First Sunlight Wednesday, July 31, 2013
Cassini monitors Saturn's magnetic field
Radio Story Tuesday, July 16, 2013
Van Allen Probes and Earth's Van Allen radiation belts
Dangerous Exposure Thursday, December 20, 2012
A powerful solar flare erupts on March 6, 2012
Stormy Skies Thursday, March 8, 2012
A January 23, 2012 solar flare
Restless Sun Monday, January 30, 2012
A comet plunges toward the Sun
Survivor: Comet Friday, December 16, 2011
The glow of the aurora from the International Space Station
Heavenly Lightshow Sunday, November 6, 2011
A solar eruption on June 7, 2011
Big Splash Tuesday, June 7, 2011
Eruption of gas from the surface of the Sun
Sun Power Wednesday, December 22, 2010
Planetary Tail Tuesday, April 6, 2010


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