21 June 2011, 02:19 PM ET
A moderate solar flare ejected in the relative direction of our home planet on June 21, 2011. All indications are that it's not particularly strong but could set off polar geomagnetic storms when it reaches Earth on June 23rd.
20 June 2011, 05:44 PM ET
Tongues of 60,000 degree plasma flick out and curl back into the Sun in this 13 hour time-lapse movie of extreme ultra-violet light. Hot licks in the soundtrack provided by Atom Strange.
16 June 2011, 06:00 AM ET
Could a giant magnetic rope that produces strong electric current be the cause of solar storms?
15 June 2011, 03:02 PM ET
Solar physicists have a keen interest in studying changes in the sun's activity.
14 June 2011, 04:19 PM ET
Solar activity dropped dramatically in 2008, and this historic lull caused a similar decrease in magnetic effects on Earth — with an eight-month lag.
14 June 2011, 03:50 PM ET
The results of three new studies point to a slowdown of solar activity even as the current solar cycle ramps up.
10 June 2011, 05:00 PM ET
Astronomers are set to reveal a "major result" about the sunspot cycle on Tuesday (June 14).
09 June 2011, 12:34 PM ET
A unique event on the sun this week ejected loads of material into space that then rained back down on the solar surface.
08 June 2011, 05:14 PM ET
A recent and powerful solar storm could trigger luminous aurora displays for some lucky skywatchers.
07 June 2011, 02:21 PM ET
See video of the spectacular June 7 solar flare and sun eruption.
31 May 2011, 05:21 PM ET
For the second time in 10 days, a comet has plunged into the sun just after a huge solar eruption.
26 May 2011, 06:23 AM ET
Spaceships and satellites can encounter stormy "seas" of debris, radiation and electromagnetic fields. Europe's space situation awareness program is anchoring new technologies and procedures to keep spacecraft afloat.
18 May 2011, 10:00 AM ET
The magnetosphere protects life on Earth from harmful solar storms.
17 May 2011, 07:30 AM ET
Super-hot bubbles of plasma feed the powerful solar storms that can wreak havoc on Earth, new research suggests.
13 May 2011, 03:21 PM ET
A comet plunged into the sun this week just as a huge solar eruption exploded.
09 May 2011, 04:40 PM ET
Hot plasma currents drag old decaying sunspots into the Sun interior, where they are re-animated by the magnetic dynamo and brought back up to the surface for the next cycle of solar activity.
02 May 2011, 04:56 PM ET
The solar wind impacting the Earth on the May 1, 2011 erupted in a magnificent display of colorful auroras.
02 May 2011, 10:03 AM ET
Rotating sunspots that twist the sun's magnetic field triggered a powerful X-class solar flare.
29 April 2011, 04:25 PM ET
It may be decades before humanity sets foot on Mars, but we're only five years away from sampling space beyond our solar system for the first time.
29 April 2011, 04:24 PM ET
Amplified hiss-like radio noise generated by electrons that traveled along magnetic field lines from Enceladus to an aurora on Saturn were captured by NASA's Cassini spacecraft.
29 April 2011, 04:24 PM ET
Here are five facts about NASA's twin Voyager 1 and 2 spacecraft, which are set to leave our solar system by 2016 or so.
20 April 2011, 12:48 PM ET
Saturn's icy moon Enceladus creates aurora glow on its parent planet.
18 April 2011, 03:38 PM ET
Studying radio emissions from auroras of Jupiter-like planets could be another technique for detecting exoplanets.
18 April 2011, 08:46 AM ET
These videos show two so-called "quiescent prominences," sheets of gas that hang in the sun's outer atmosphere.
15 April 2011, 04:14 PM ET
After spending three years in a deep sleep of historic proportions, the sun is finally starting to wake up.
13 April 2011, 06:00 AM ET
When powerful sun storms set off dazzling auroras in March, photographer Torje Sorgjerd was ready.
13 April 2011, 04:40 AM ET
See amazing images of auroras taken by skywatchers.
07 April 2011, 05:07 PM ET
In March 2011, photographer Terje Sorgjerd spent a week filming a dazzling display of northern lights in Norway, near the Russian border.
07 April 2011, 02:00 PM ET
The vortex at Venus' south pole can look like a giant 'S' or number '8.'
24 March 2011, 07:08 AM ET
The sun unleashed a plasma tentacle in a March 19 eruption and solar prominence.
23 March 2011, 05:22 PM ET
NASA’s Solar Dynamics Observatory captured this nicely rounded sun eruption from March 19, 2011 as the prominence became unstable and erupted into space with a distinct twisting motion.
23 March 2011, 11:33 AM ET
Saturn's odd radio emissions likely show the sun's shifting influence on the giant planet.
10 March 2011, 12:00 PM ET
NASA's 34-year-old Voyager 1 probe is performing new tricks at the solar system's edge.
10 March 2011, 07:55 AM ET
A powerful X1.5-class solar flare could make auroras visible in northern U.S. and Canada.
02 March 2011, 05:21 PM ET
The solar wind is creating spectacular auroras this week.
02 March 2011, 01:01 PM ET
Astronomers use computer simulations to figure out what caused the drought.